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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.