number
number — attempts to convert an expression to a number.
Arguments
- s_exp
Any Gamma or Lisp
expression.
Returns
A numeric representation of the s_exp
if possible, otherwise zero.
Description
The function attempts to convert its argument to a number.
Integer and floating point values remain untouched.
String arguments are converted to numbers by attempting to
read a number from the string starting at the first
character in the string. The longest legal number at the
beginning of the string is used. All other data types
return zero. If possible, the result will be an integer.
If the result cannot be represented as an integer, a real
(floating point) number is returned.
Example
Gamma> number(5);
5
Gamma> number("5.4m");
5.4000000000000003553
Gamma> number("m5.4");
0
Gamma> number(#a);
0
Gamma>
