# SSUB

Subtracts two numeric strings.

## Synopsis

```SSUB(numstr1,numstr2)
```

### Arguments

 numstr1 The minuend. An expression that resolves to a number or numeric string. numstr2 The subtrahend. An expression that resolves to a number or numeric string.

## Description

The SSUB function subtracts numstr2 from numstr1, 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.

### Arithmetic Operations

• To perform arithmetic operations on numeric strings, use the SADD, SSUB, SMUL, and SDIV functions.

• To perform arithmetic operations on floating point numbers, use the FADD, FSUB, FMUL, and FDIV functions, or use the standard arithmetic operators.

• To perform integer division, use the DIV function. To perform modulo division, use the MOD function.

• To perform arithmetic operations on corresponding elements of dynamic arrays, use the ADDS, SUBS, MULS, DIVS, and MODS functions.

• To perform numeric comparison operations, use the SCMP function, or use the standard comparison operators.

## Examples

The following examples use the SSUB function to subtract two numeric strings. All of these examples return 4:

``````PRINT SSUB(7,3)
PRINT SSUB("7","3")
PRINT SSUB("+7.00","003")
PRINT SSUB("7dwarves","3wishes")
``````

All of the following examples return 7:

``````PRINT SSUB(7,0)
PRINT SSUB("7","")
PRINT SSUB("7","three")
``````