String2Float

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Summary

Function: float String2Float( string str );

Returns a float that will be signed if negative.

• string str string to be typecast to a float

The number str provided as a string may be negative and may or may not have a decimal point
Returns 0.000000 if the string contains non-numerical characters (other than a negative sign or a decimal point).

Example:

float My_new_float = String2Float("40.23578");
// returns 40.235780
 
float My_new_float = String2Float("-683.3");
// returns -683.300000
 
float My_new_float = String2Float("9924");
// returns 9924.000000

Specification

float String2Float(string ST)
{
    list nums = ["0","1","2","3","4","5","6","7","8","9",".","-"];
    float FinalNum = 0.0;
    integer idx = llSubStringIndex(ST,".");
    if (idx == -1)
    {
        idx = llStringLength(ST);
    }
    integer Sgn = 1;
    integer j;
    for (j=0;j< llStringLength(ST);j++)
    {
        string Char = llGetSubString(ST,j,j);
        if (~llListFindList(nums,[Char]))
        {
            if((j==0) && (Char == "-"))
            {
                Sgn = -1;
            }
            else if (j < idx)
            {
                FinalNum = FinalNum + (float)Char * llPow(10.0,((idx-j)-1));
            }
            else if (j > idx)
            {
                FinalNum = FinalNum + (float)Char * llPow(10.0,((idx-j)));
            }
        }
    }
    return FinalNum * Sgn;
}

Examples