pow2 : int -> num

SYNOPSIS
Returns power of 2 as unlimited-size integer.

DESCRIPTION
When applied to an integer n (type int), pow2 returns $2^n$ as an unlimited-precision integer (type num). The argument may be negative.

FAILURE CONDITIONS
Never fails.

EXAMPLE
  # pow2(-2);;
  val it : num = 1/4
  # pow2(64);;
  val it : num = 18446744073709551616

SEE ALSO
pow10.