Function: KA
Return if char 'ch' found in 'any' string, set index 'n' accordingly.
Parameters:
number (n), string (ch), string (any)
Returns:
boolean (true/false)
Return if char 'ch' found in 'any' string, set index 'n' accordingly.
Parameters:
number (n), string (ch), string (any)
Returns:
boolean (true/false)