Modern String IsNumeric

Home › String Library › String Library › IsNumeric

IsNumeric

Returns true if the string is a valid number, with spaces allowed around it.

Syntax

IsNumeric( s )

Notes

• O(n) — boolean

Examples

#import "std/strings"
using strings

print IsNumeric( " -1.5e+3 " )    '' true -- surrounding whitespace is allowed
print IsNumeric( "42" )           '' true
print IsNumeric( "12abc" )        '' false -- trailing junk fails
print IsNumeric( "" )             '' false -- at least one digit is required
print IsNumeric( "&HFF" )         '' false -- radix literals are tiko syntax, not numeric text

---

Library: String Library
Category: String Library
Documented under: The Functions