isZero

 

 

Description

The isZero function returns true if the specified argument {obj} is #void; otherwise, false is returned.

When to use

The isNull function returns true if the specified argument {obj} is equal to Zero; otherwise, false is returned.

 

Syntax

(isZero obj)


Name Description AIS Types
objThe object to be testedNumber Void


Returns:

Returns true if the object is zero, false is returned otherwise

 

Examples

Here are a number of links to Lambda coding examples which contain this instruction in various use cases.

Example_Number_isZero_001

These examples check if the numeric argument has the value of zero.

 

Argument Types

Here are the links to the data types of the function arguments.

Number Boolean Void

Here are also a number of links to functions having arguments with any of these data types.

++(Symbol) +=(Symbol) +(Complex) +(Number)
/=(Symbol) /(Complex) /(Number) *(Complex)
*(Number) --(Symbol) -=(Symbol) -(Complex)
-(Number) abortTransaction(ObjectRepository) abs(Complex) abs(Number)
acos(Number) add1(Number) addMethod(BitVector) addMethod(Boolean)
addMethod(Brick) addMethod(Character) addMethod(CpxVector) addMethod(Date)
addMethod(Dictionary) addMethod(Directory) addMethod(FltVector) addMethod(Function)
addMethod(IntVector) addMethod(List) addMethod(Matrix) addMethod(NumMatrix)
addMethod(NumVector) addMethod(Number) addMethod(ObjVector) addMethod(ObjectRepository)
addMethod(Pair) addMethod(PcodeVector) addMethod(ShortVector) addMethod(String)
addMethod(Structure) addMethod(Symbol) addMethod(Vector) addMethod(Void)
addi(Number) argument(Complex) arithmetic(Number) asin(Number)
atan(Number) avg(CpxVector) avg(Number) badd(Boolean)
bcompareEQ(Boolean) bcompareGE(Boolean) bcompareGT(Boolean) bcompareLE(Boolean)
bcompareLT(Boolean) bcompareNE(Boolean) bdiv(Boolean) beginTransaction(ObjectRepository)
binaryInsert(CpxVector) binaryInsert(FltVector) binaryInsert(IntVector) binaryInsert(Matrix)
binaryInsert(NumMatrix) binaryInsert(NumVector) binaryInsert(ShortVector) binaryInsert(Structure)
binaryInsert(Vector) binaryNand(Integer) binaryNor(Integer) binaryNot(Integer)
binaryNxor(Integer) binarySearch(CpxVector) binarySearch(Dictionary) binarySearch(FltVector)
binarySearch(IntVector) binarySearch(Matrix) binarySearch(NumMatrix) binarySearch(NumVector)
binarySearch(ObjVector) binarySearch(ShortVector) binarySearch(Structure) binarySearch(Vector)
bitwiseAnd(Integer) bitwiseNand(Integer) bitwiseNor(Integer) bitwiseNot(Integer)
bitwiseNxor(Integer) bitwiseOr(Integer) bitwiseShiftLeft(Integer) bitwiseShiftRight(Integer)
bitwiseXor(Integer) bmod(Boolean) bmul(Boolean) boolean(Boolean)
ccompareEQ(Character) ccompareGE(Character) ccompareGT(Character) ccompareLE(Character)
ccompareLT(Character) ccompareNE(Character) character(Character) checkPointTransaction(ObjectRepository)
clear(Context) clear(ObjectRepository) commitTransaction(ObjectRepository) compareEQ(BitVector)
compareEQ(Boolean) compareEQ(Brick) compareEQ(Character) compareEQ(Complex)
compareEQ(CpxVector) compareEQ(Date) compareEQ(Dictionary) compareEQ(Directory)
compareEQ(FltVector) compareEQ(Function) compareEQ(IntVector) compareEQ(Lambda)
compareEQ(List) compareEQ(Matrix) compareEQ(NumMatrix) compareEQ(NumVector)
compareEQ(Number) compareEQ(ObjVector) compareEQ(ObjectRepository) compareEQ(Pair)
compareEQ(ShortVector) compareEQ(String) compareEQ(Structure) compareEQ(Symbol)
compareEQ(Vector) compareEQ(Void) compareGE(BitVector) compareGE(Boolean)
compareGE(Brick) compareGE(Character) compareGE(Complex) compareGE(CpxVector)
compareGE(Date) compareGE(Dictionary) compareGE(Directory) compareGE(Function)
compareGE(IntVector) compareGE(Lambda) compareGE(List) compareGE(Matrix)
compareGE(NumMatrix) compareGE(Number) compareGE(ObjVector) compareGE(ObjectRepository)
compareGE(Pair) compareGE(ShortVector) compareGE(String) compareGE(Structure)
compareGE(Symbol) compareGE(Vector) compareGE(Void) compareGT(BitVector)
compareGT(Boolean) compareGT(Brick) compareGT(Character) compareGT(Complex)
compareGT(CpxVector) compareGT(Date) compareGT(Dictionary) compareGT(Directory)
compareGT(Function) compareGT(IntVector) compareGT(Lambda) compareGT(List)
compareGT(Matrix) compareGT(NumMatrix) compareGT(NumVector) compareGT(Number)
compareGT(ObjVector) compareGT(ObjectRepository) compareGT(Pair) compareGT(ShortVector)
compareGT(String) compareGT(Structure) compareGT(Symbol) compareGT(Vector)
compareGT(Void) compareLE(BitVector) compareLE(Boolean) compareLE(Brick)
compareLE(Character) compareLE(Complex) compareLE(CpxVector) compareLE(Date)
compareLE(Dictionary) compareLE(Directory) compareLE(FltVector) compareLE(Function)
compareLE(IntVector) compareLE(Lambda) compareLE(List) compareLE(Matrix)
compareLE(NumMatrix) compareLE(NumVector) compareLE(Number) compareLE(ObjVector)
compareLE(ObjectRepository) compareLE(Pair) compareLE(ShortVector) compareLE(String)
compareLE(Structure) compareLE(Symbol) compareLE(Vector) compareLE(Void)
compareLT(BitVector) compareLT(Boolean) compareLT(Brick) compareLT(Character)
compareLT(Complex) compareLT(CpxVector) compareLT(Date) compareLT(Dictionary)
compareLT(Directory) compareLT(FltVector) compareLT(Function) compareLT(IntVector)
compareLT(Lambda) compareLT(List) compareLT(Matrix) compareLT(NumMatrix)
compareLT(NumVector) compareLT(Number) compareLT(ObjVector) compareLT(ObjectRepository)
compareLT(Pair) compareLT(ShortVector) compareLT(String) compareLT(Structure)
compareLT(Symbol) compareLT(Vector) compareLT(Void) compareNE(BitVector)
compareNE(Boolean) compareNE(Brick) compareNE(Character) compareNE(Complex)
compareNE(CpxVector) compareNE(Date) compareNE(Dictionary) compareNE(Directory)
compareNE(FltVector) compareNE(Function) compareNE(IntVector) compareNE(Lambda)
compareNE(List) compareNE(Matrix) compareNE(NumMatrix) compareNE(NumVector)
compareNE(Number) compareNE(ObjVector) compareNE(ObjectRepository) compareNE(Pair)
compareNE(ShortVector) compareNE(String) compareNE(Structure) compareNE(Symbol)
compareNE(Vector) compareNE(Void) compare(BitVector) compare(Boolean)
compare(Brick) compare(Character) compare(Complex) compare(CpxVector)
compare(Date) compare(Dictionary) compare(Directory) compare(FltVector)
compare(Function) compare(IntVector) compare(Lambda) compare(List)
compare(Matrix) compare(NumMatrix) compare(NumVector) compare(Number)
compare(ObjVector) compare(ObjectRepository) compare(Pair) compare(ShortVector)
compare(String) compare(Structure) compare(Symbol) compare(Vector)
compare(Void) comparison(BitVector) comparison(Boolean) comparison(Brick)
comparison(Character) comparison(Complex) comparison(Date) comparison(Dictionary)
comparison(Directory) comparison(FltVector) comparison(Function) comparison(IntVector)
comparison(List) comparison(Matrix) comparison(NumMatrix) comparison(NumVector)
comparison(Number) comparison(ObjVector) comparison(ObjectRepository) comparison(Pair)
comparison(ShortVector) comparison(String) comparison(Structure) comparison(Symbol)
comparison(Vector) comparison(Void) compile(Lambda) compile(List)
cons(Pair) cos(Complex) cos(Number) cosh(Number)
count(Dictionary) count(Directory) count(List) count(Matrix)
count(NumMatrix) count(Pair) count(Structure) count(Vector)
date(Date) day(Date) days360(Date) debug(Context)
debug(Lambda) decode(ByteVector) deg(Number) disassemble(Context)
disassemble(Lambda) display(ByteVector) display(FileIO) divi(Number)
exp(Complex) exp(Number) exportTab(Lambda) exportTab(ObjectRepository)
expt(Complex) expt(Number) fact(Integer) fact(Number)
fdisplay(ByteVector) fdisplay(Text) fileClose(ByteVector) fileClose(Text)
fileDisplay(ByteVector) fileDisplay(Text) fileErase(ByteVector) fileErase(Text)
fileOpen(ByteVector) fileOpen(Text) fileRead(ByteVector) fileRead(Text)
fileWrite(ByteVector) fileWrite(String) fileWrite(Text) filewriteln(ByteVector)
filewriteln(String) filewriteln(Text) findBlock(BitVector) floor(Number)
fraction(Number) gc(Context) getTickCount(Date) hour(Date)
iadd(Integer) icompareEQ(Integer) icompareGE(Integer) icompareGT(Integer)
icompareLE(Integer) icompareLT(Integer) icompareNE(Integer) idiv(Integer)
imod(Integer) importTab(Lambda) importTab(ObjectRepository) imul(Number)
inside(BitVector) inside(Dictionary) inside(Directory) inside(IntVector)
inside(List) inside(Matrix) inside(NumMatrix) inside(NumVector)
inside(ShortVector) inside(Structure) inside(Vector) inspect(Context)
inspect(Lambda) inspect(ObjectRepository) integer(Integer) isAtom(BitVector)
isAtom(Brick) isAtom(Dictionary) isAtom(Directory) isAtom(FltVector)
isAtom(IntVector) isAtom(List) isAtom(Matrix) isAtom(NumMatrix)
isAtom(NumVector) isAtom(ObjVector) isAtom(Pair) isAtom(PcodeVector)
isAtom(ShortVector) isAtom(Structure) isAtom(Vector) isBitVector(BitVector)
isBoolean(Boolean) isBound(Dictionary) isBound(Directory) isBound(Structure)
isByteVector(ByteVector) isCharAlphabetic(ByteVector) isCharAlphabetic(String) isCharAlphabetic(Symbol)
isCharAlphanumeric(ByteVector) isCharAlphanumeric(String) isCharAlphanumeric(Symbol) isCharLowercase(ByteVector)
isCharLowercase(String) isCharLowercase(Symbol) isCharName(ByteVector) isCharName(String)
isCharName(Symbol) isCharNumeric(ByteVector) isCharNumeric(String) isCharNumeric(Symbol)
isCharUppercase(ByteVector) isCharUppercase(String) isCharUppercase(Symbol) isCharWhitespace(ByteVector)
isCharWhitespace(String) isCharWhitespace(Symbol) isChar(String) isCharacter(Character)
isComplex(Complex) isDate(Date) isDictionary(Dictionary) isDirectory(Directory)
isEqual(BitVector) isEqual(Boolean) isEqual(Brick) isEqual(Character)
isEqual(Complex) isEqual(Date) isEqual(Dictionary) isEqual(Directory)
isEqual(FltVector) isEqual(Function) isEqual(IntVector) isEqual(List)
isEqual(Matrix) isEqual(NumMatrix) isEqual(NumVector) isEqual(Number)
isEqual(ObjVector) isEqual(Pair) isEqual(ShortVector) isEqual(String)
isEqual(Structure) isEqual(Vector) isEqual(Void) isError(Error)
isEven(Number) isExact(Number) isFloatVector(FltVector) isIdentical(BitVector)
isIdentical(Boolean) isIdentical(Brick) isIdentical(Character) isIdentical(Complex)
isIdentical(Date) isIdentical(Dictionary) isIdentical(Directory) isIdentical(Error)
isIdentical(FltVector) isIdentical(Function) isIdentical(IntVector) isIdentical(List)
isIdentical(Matrix) isIdentical(NumMatrix) isIdentical(NumVector) isIdentical(Number)
isIdentical(ObjVector) isIdentical(ObjectRepository) isIdentical(Pair) isIdentical(PcodeVector)
isIdentical(ShortVector) isIdentical(Structure) isIdentical(Vector) isIdentical(Void)
isImmediate(ObjectRepository) isInexact(Number) isInside(BitVector) isInside(Dictionary)
isInside(Directory) isInside(IntVector) isInside(List) isInside(Matrix)
isInside(NumMatrix) isInside(NumVector) isInside(ObjVector) isInside(Pair)
isInside(ShortVector) isInside(Structure) isInside(Vector) isIntegerVector(IntVector)
isInteger(Integer) isMatrix(Matrix) isMember(BitVector) isMember(Dictionary)
isMember(Directory) isMember(IntVector) isMember(List) isMember(Matrix)
isMember(NumMatrix) isMember(NumVector) isMember(ObjVector) isMember(Pair)
isMember(ShortVector) isMember(Structure) isMember(Vector) isMoney(Number)
isNegative(Number) isNull(Number) isNull(Void) isNumberMatrix(NumMatrix)
isNumberVector(NumVector) isNumber(Number) isObjectVector(ObjVector) isObject(BitVector)
isObject(Brick) isObject(ByteVector) isObject(Dictionary) isObject(Directory)
isObject(FltVector) isObject(IntVector) isObject(List) isObject(Matrix)
isObject(NumMatrix) isObject(NumVector) isObject(ObjVector) isObject(Pair)
isObject(PcodeVector) isObject(ShortVector) isObject(String) isObject(Structure)
isObject(Symbol) isObject(Vector) isOdd(Number) isPair(List)
isPair(Pair) isPcodeVector(PcodeVector) isPositive(Number) isString(String)
isStructure(Structure) isSymbol(Symbol) isText(String) isTransaction(ObjectRepository)
isType(BitVector) isType(Boolean) isType(Brick) isType(Character)
isType(Complex) isType(Date) isType(Dictionary) isType(Directory)
isType(FltVector) isType(Function) isType(IntVector) isType(Matrix)
isType(NumMatrix) isType(NumVector) isType(Number) isType(ObjVector)
isType(ObjectRepository) isType(Pair) isType(ShortVector) isType(String)
isType(Structure) isType(Symbol) isType(Vector) isType(Void)
isVector(Vector) isZero(Number) isub(Integer) julian(Date)
kurtosis(Number) length(BitVector) length(Brick) length(Dictionary)
length(Directory) length(FltVector) length(IntVector) length(List)
length(Matrix) length(NumMatrix) length(NumVector) length(ObjVector)
length(ObjectRepository) length(Pair) length(PcodeVector) length(ShortVector)
length(String) length(Structure) length(Symbol) length(Vector)
lisp(Lambda) lisp(List) list(List) loadWorkspace(Context)
log10(Complex) log10(Number) log2(Complex) log2(Number)
log(Complex) log(Number) logbase(Complex) logbase(Number)
macroReplace(String) makeQuotedList(List) max(Number) median(Number)
member(BitVector) member(Dictionary) member(Directory) member(IntVector)
member(List) member(Matrix) member(NumMatrix) member(NumVector)
member(ObjVector) member(ShortVector) member(Structure) member(Vector)
min(Number) minute(Date) mod(Complex) mod(Number)
modi(Number) money(Number) month(Date) morph(List)
muli(Number) nadd(Number) ncompareEQ(Number) ncompareGE(Number)
ncompareGT(Number) ncompareLE(Number) ncompareLT(Number) ncompareNE(Number)
ndiv(Number) new(BitVector) new(Brick) new(ByteVector)
new(CpxVector) new(Dictionary) new(Directory) new(FltVector)
new(IntVector) new(Lambda) new(Matrix) new(NumMatrix)
new(NumVector) new(ObjVector) new(ObjectRepository) new(PcodeVector)
new(ShortVector) new(String) new(Structure) new(Symbol)
new(Vector) nmod(Number) nmul(Number) now(Date)
nsub(Number) number(Number) objectToMatrix(Matrix) objectToNumMatrix(NumMatrix)
objectToNumVector(NumVector) onError(Error) onError(Lambda) pair(Pair)
parse(String) pi(Number) product(Number) rad(Number)
random(Number) randomize(Number) range(Number) ref(BitVector)
ref(Boolean) ref(Brick) ref(Character) ref(Complex)
ref(Date) ref(Dictionary) ref(Directory) ref(FltVector)
ref(Function) ref(IntVector) ref(Lambda) ref(List)
ref(Matrix) ref(NumMatrix) ref(NumVector) ref(Number)
ref(ObjVector) ref(ObjectRepository) ref(PcodeVector) ref(ShortVector)
ref(String) ref(Structure) ref(Symbol) ref(Vector)
ref(Void) remove(BitVector) remove(Dictionary) remove(Directory)
remove(IntVector) remove(Matrix) remove(NumMatrix) remove(NumVector)
remove(ObjVector) remove(ShortVector) remove(Structure) remove(Vector)
rename(ObjectRepository) reset(Context) round(Number) saveObject(ByteVector)
saveObject(Integer) saveRepository(ObjectRepository) saveWorkspace(Context) second(Date)
send(BitVector) send(Boolean) send(Brick) send(Character)
send(CpxVector) send(Date) send(Dictionary) send(Directory)
send(FltVector) send(Function) send(IntVector) send(Lambda)
send(List) send(Matrix) send(NumMatrix) send(NumVector)
send(Number) send(ObjectRepository) send(Pair) send(ShortVector)
send(String) send(Structure) send(Symbol) send(Vector)
send(Void) setBlock(BitVector) setCar(List) setCar(Pair)
setCdr(BitVector) setCdr(Brick) setCdr(Dictionary) setCdr(Directory)
setCdr(FltVector) setCdr(IntVector) setCdr(List) setCdr(Matrix)
setCdr(NumMatrix) setCdr(NumVector) setCdr(ObjVector) setCdr(Pair)
setCdr(ShortVector) setCdr(Structure) setCdr(Vector) setLastCdr(BitVector)
setLastCdr(FltVector) setLastCdr(IntVector) setLastCdr(List) setLastCdr(Matrix)
setLastCdr(NumMatrix) setLastCdr(NumVector) setLastCdr(ObjVector) setLastCdr(Structure)
setLastCdr(Vector) set(ObjectRepository) setf(ObjectRepository) setq(BitVector)
setq(Boolean) setq(Brick) setq(Character) setq(Date)
setq(Dictionary) setq(Directory) setq(FltVector) setq(IntVector)
setq(Lambda) setq(List) setq(Matrix) setq(NumVector)
setq(Number) setq(ObjVector) setq(ObjectRepository) setq(PcodeVector)
setq(ShortVector) setq(String) setq(Structure) setq(Symbol)
setq(Vector) setq(Void) sign(Number) sin(Complex)
sin(Number) sinh(Number) sizeof(BitVector) sizeof(Boolean)
sizeof(Brick) sizeof(ByteVector) sizeof(Character) sizeof(Complex)
sizeof(Date) sizeof(Dictionary) sizeof(Directory) sizeof(FltVector)
sizeof(Function) sizeof(IntVector) sizeof(List) sizeof(Matrix)
sizeof(NumMatrix) sizeof(NumVector) sizeof(Number) sizeof(ObjVector)
sizeof(ObjectRepository) sizeof(Pair) sizeof(PcodeVector) sizeof(ShortVector)
sizeof(String) sizeof(Structure) sizeof(Symbol) sizeof(Vector)
sizeof(Void) skew(Number) sort(BitVector) sort(Dictionary)
sort(Directory) sort(FltVector) sort(IntVector) sort(List)
sort(Matrix) sort(NumMatrix) sort(NumVector) sort(ObjVector)
sort(ShortVector) sort(Structure) sort(Vector) sqrt(Complex)
sqrt(Number) srandom(Number) stdev(Number) stdevp(Number)
stringCiEQ(String) stringCiGE(String) stringCiGT(String) stringCiLE(String)
stringCiLT(String) stringCiNE(String) string(Complex) string(String)
sub1(Number) subi(Number) submit(Context) subscribe(Context)
substringCiEQ(String) substringCiGE(String) substringCiGT(String) substringCiLE(String)
substringCiLT(String) substringCiNE(String) substringEQ(String) substringGE(String)
substringGT(String) substringLE(String) substringLT(String) substringNE(String)
sum(Complex) sum(Number) sumsqr(Complex) sumsqr(Number)
systemCheck(Context) tan(Complex) tan(Number) tanh(Number)
time(Date) type(BitVector) type(Boolean) type(Brick)
type(ByteVector) type(Character) type(Complex) type(Date)
type(Dictionary) type(Directory) type(FltVector) type(Function)
type(IntVector) type(Lambda) type(Matrix) type(NumMatrix)
type(NumVector) type(Number) type(ObjVector) type(ObjectRepository)
type(Pair) type(PcodeVector) type(ShortVector) type(String)
type(Structure) type(Symbol) type(Vector) type(Void)
uniqueInsert(FltVector) uniqueInsert(IntVector) uniqueInsert(Matrix) uniqueInsert(NumMatrix)
uniqueInsert(NumVector) uniqueInsert(ObjVector) uniqueInsert(ShortVector) uniqueInsert(Structure)
uniqueInsert(Vector) var(Number) varp(Number) vectorBinaryInnerProduct(NumVector)
vectorBipolarInnerProduct(NumVector) vectorCosineInnerProduct(NumVector) vectorCubeInnerProduct(NumVector) vectorExpInnerProduct(NumVector)
vectorFill(BitVector) vectorFill(FltVector) vectorFill(IntVector) vectorFill(Matrix)
vectorFill(NumMatrix) vectorFill(NumVector) vectorFill(ObjVector) vectorFill(ShortVector)
vectorFill(Vector) vectorInnerProduct(NumVector) vectorLogInnerProduct(NumVector) vectorQuartInnerProduct(NumVector)
vectorQuintInnerProduct(NumVector) vectorSigmoidInnerProduct(NumVector) vectorSineInnerProduct(NumVector) vectorSquareInnerProduct(NumVector)
vectorTanInnerProduct(NumVector) vectorTanhInnerProduct(NumVector) version(Context) writeln(ByteVector)
writeln(String) writeln(Text) year(Date)

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