IsNumber / Number?

Boolean = IsNumber ( Expression )

Boolean = Number? ( Expression )

Returns if an expression is a number, i.e. if it is :

Example :

PRINT IsNumber(1)
=> TRUE

PRINT IsNumber(TRUE)
=> TRUE

PRINT IsNumber(Pi)
=> TRUE

PRINT IsNumber(Now)
=> FALSE

PRINT IsNumber(NULL)
=> FALSE


Referenced by :