Subtracts two numeric strings.
function subtracts numstr2
, expressed as either numbers or as strings, and returns the result. Leading plus signs and leading and trailing zeros are ignored. A string is parsed as a number until a non-numeric character is encountered. Thus 7dwarves is parsed as 7. Non-numeric strings and null strings are parsed as 0.
To perform arithmetic operations on numeric strings, use the SADD
, and SDIV
To perform arithmetic operations on floating point numbers, use the FADD
, and FDIV
functions, or use the standard arithmetic operators.
To perform integer division, use the DIV
function. To perform modulo division, use the MOD
To perform arithmetic operations on corresponding elements of dynamic arrays, use the ADDS
, and MODS
To perform numeric comparison operations, use the SCMP
function, or use the standard comparison operators.
The following examples use the SSUB
function to subtract two numeric strings. All of these examples return 4:
All of the following examples return 7: