checks if string only contains numbers

[Hellohihi]

How do i check if a string only contain numbers.
No letters allow, only whole numbers.

Is there a function for it?

 

[Romek]

function IsStringNumber takes string s returns boolean
   return I2S(S2I(s)) == s
endfunction

 

[Darthfett]

function IsStringNumber takes string s returns boolean
   return I2S(S2I(s)) == s
endfunction

Romek's works great for any string that is less than or equal to 8 characters long.

Jass can only handle numbers up to 8 digits. However, for anything longer, you'd have to loop through the string 8 digits at a time.

function isNumeric takes string str returns boolean
//returns whether a string only contains numbers
    local integer i = 0
    local string s
    loop
        set s = SubString(str, i, i + 8)
        exitwhen s == null
        if I2S(S2I(s)) != s then
            return false
        endif
        set i = i + 8
    endloop
    return true
endfunction

Can be found in my Advanced Strings System. If you're working a lot with strings, you may find something useful in it.