%num() Function

%num() function is used to convert the result of the given expression to a number. We already know that if the given parameter is a symbol we can use data type specifier 'n:' in front of the symbol name for the same purpose, but that wouldn't work if the parameter is an expression.

Syntax:

%num(expression [, default-number])

expression

The expression whose result is subject for conversion.

default-number

The default value to return, in case of the expression result cannot be converted to a number. This parameter is optional and if omitted and if the result cannot be converted to a number an CScript exception occurs.

Expression Result	Returned Value
'' or 'false' or 'False'	0
'true' or 'True'	1
A Valid Number	The Number
An Invalid Number	The Default Number

Examples:

%doif( num(PRICE,100) > MAXPRICE)

...

%doend()

%set( A, num(sstr(B,1,2)) * 2 )