[Untonyst]

1. If you are looking for a only one symbol, it is better to use a loop.
2. If necessary to use a for loop for the whole string, it is not necessary to know the size of the string.
   
   
   
   PHP Code:

   new string[128] = "qw;lasdl;k1l;k2l;4k;"; // :D
for (new i; /* none */ ;i++)
{
    if (string[i] == 'l')
    {
        // do something
        // ...
        // loop is complete
        break;
    }
    // cycle is complete
    // if symbol is not found
    if (string[i] == '\0')
    {
        break;
    }
} 

   or
   
   
   PHP Code:

   new string[128] = "qw;lasdl;k1l;k2l;4k;",
    i;
while (string[i++] != '\0')
{
    if (string[i] == 'l')
    {        
        // do something
        // ...
        // loop is complete
        break;
    }
} 

3. For more optimization you can use variables, so often not to refer to the array index.
   
   
   PHP Code:

   new string[128] = "qw;lasdl;k1l;k2l;4k;", 
    c,    // is values of the array index 
    i     // index 
; 
while ((c = string[i++]) != '\0')
{
    if (c == 'l')
    {        
        // do something
        // ...
        // loop is complete
        break;
    }
} 

4. If the condition need to compare three numbers, it is possible to make it so
   
   PHP Code:

   new value = 7;
if (1 <= value <= 9)
{
    // do something
}