Tests the bit status in an integer expression.
Bool = Btst(m, n)
m, n:iexp
Btst(m, n) returns -1(true) when the n-th bit in the integer expression m is set, and 0 (false) if it's not.
Local i% = 10 // 10 => 1010
Print Btst(i%, 3) // Prints True
{Created by Sjouke Hamstra; Last updated: 24/09/2014 by James Gaite}