TRUE

constant

Constant

integer TRUE = 1;

Constant used to define the TRUE value in conditional structures or variables/constants in general. Usually it’s used because it is more readable, indicating a boolean value instead a integer value (1). However, this is an arbitrary distinction in LSL which uses integers to represent Boolean values anyway. It is probably better to consider TRUE and FALSE as mnemonic constants for the integer values 1 and 0.

Examples

Example 1

integer q;

default
{
    state_entry()
    {
        q = TRUE;
        if(q)
        {
            llSay(0, "TRUE");
            q = FALSE;
            if(!q)
            {
                llSay(0, "FALSE");
                q = TRUE;
                if(!q)
                {
                    llSay(0, "Won't say this");
                }
                else
                {
                    llSay(0, "TRUE");
                    q = FALSE;
                    if(q)
                    {
                        llSay(0, "Won't say this");
                    }
                    else
                    {
                        llSay(0, "FALSE");
                    }
                }
            }
            else
            {
                llSay(0, "Won't say this");
            }
        }
        else
        {
            llSay(0, "Won't say this");
        }
    }
}

Notes

• Note that all non-zero integers test as ‘true’ in statements such as “if (x) … ” but only the value 1 corresponds to TRUE as in “if (x == TRUE) …”
• A double exclamation mark can be used to convert any ‘true’ or FALSE integer to Boolean TRUE/FALSE as in “integer Bool = !!value;”

See also

Constants

Constant	Type	Value	Description
FALSE

Articles

• boolean

Original wiki source

Some wiki templates and tables need their original context. View this article on the Second Life Wiki. Technical wording and examples are retained from the source; historical guidance may differ from current behavior.

From the Second Life Wiki

Community documentation adapted from TRUE, by Linden Research, Inc. and contributing residents.View contributors and history.

Imported wiki revision:

• TRUE (revision 1194714, 2015-01-24)

Licensed under CC BY-SA 3.0. Last wiki edit: 2015-01-24.Formatting and links have been adapted for this site; API metadata follows the LSL definitions.