left

 

 

Overview

The left function returns a specified number of characters from a Text or String argument, beginning at the leftmost character.

Usage

The left function is used to create a substring of a specified length starting from the leftmost character in a String or Text.

 

Syntax

Expression:

(left text length)


Arguments Name Type Description
Argument:text String or Text A String object or Text
Argument:lengthInteger A positive integer representing the number of characters to return.

Returns:

The substring of length {length} starting from the leftmost character


 

Examples

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

 

Argument Types

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

String Text Integer

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

++ += + /=
/ *= * --
-= - addMethod addi
appendWriteln append avg badd
balance bdiv binaryInsert binaryNand
binaryNor binaryNot binaryNxor binarySearch
bitwiseAnd bitwiseNand bitwiseNor bitwiseNot
bitwiseNxor bitwiseOr bitwiseShiftLeft bitwiseShiftRight
bitwiseXor bmod bmul boolean
cadd cdiv char character
clean closeLog cmod cmul
code compareEQ compareGE compareGT
compareLE compareLT compareNE compare
comparison compress cons count
csub date day days360
debugBrowsableProcs debugDetective debugEval deleteRows
delete dimension disassemble display
divi downcase encode evalInSyncLocalContext
eval exit exportCsv exportSbf
exportTab fact fdisplay fileClose
fileCopy fileDir fileDisplay fileEraseDir
fileErase fileExists fileMakeDir fileOpen
fileReadAll fileReadRecord fileRead fileResize
fileSeek fileSizeOf fileWriteAll fileWrite
filewriteln findBlock find floor
fraction freeBlock gcd getRecursionCount
hashString hour iadd icompareEQ
icompareGE icompareGT icompareLE icompareLT
icompareNE idiv imod importCsv
importSbf importTab imul insertRows
insert inside inspect integer
isAtom isBitVector isBoolean isBound
isByteVector isCharAlphabetic isCharAlphanumeric isCharLowercase
isCharName isCharNumeric isCharUppercase isCharWhitespace
isChar isCharacter isComplex isDate
isDictionary isDirectory isEqual isError
isEven isFloatVector isIdentical isInside
isIntegerVector isInteger isLambda isMatrix
isMember isMoney isNumberMatrix isNumberVector
isNumber isObjectVector isObject isPair
isPcodeVector isString isStructure isSymbol
isText isType isVector isub
julian kurtosis lcm left
length list loadModule loadWorkspace
macroReplace makeQuotedList makeQuotedSymbol max
median member mid min
minute mod modi money
month muli new number
objectToMatrix objectToNumMatrix objectToNumVector offset
openLog pair parent parse
pointer preAllocateFixedMemoryBlocks product qt
random randomize range rank
refAttributes refValues ref remove
replace rept resize right
round run saveImmediate saveModule
saveObject saveRepository saveWorkspace second
setAttributes setBlock setCar setCdr
setLastCdr set setf setq
sizeof skew sort sql
sqrt srandom stdev stdevp
stringCiEQ stringCiGE stringCiGT stringCiLE
stringCiLT stringCiNE stringFill stringToBVector
stringToVector string subi submit
substitute substringCiEQ substringCiGE substringCiGT
substringCiLE substringCiLT substringCiNE substringEQ
substringFill substringGE substringGT substringLE
substringLT substringNE substring sum
sumsqr svmRegression symbolToTypeCode symbol
system text time trim
type uniqueInsert upcase var
varp vectorBinaryInnerProduct vectorBipolarInnerProduct vectorCosineInnerProduct
vectorCubeInnerProduct vectorDelete vectorExpInnerProduct vectorFill
vectorInnerProduct vectorLogInnerProduct vectorQuartInnerProduct vectorQuintInnerProduct
vectorSigmoidInnerProduct vectorSineInnerProduct vectorSquareInnerProduct vectorTanInnerProduct
vectorTanhInnerProduct writelg writeln year

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