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Function std.math.exponential.powmod

Computes the value of a positive integer x, raised to the power n, modulo m.

Unqual!(Largest!(F,H)) powmod(F, G, H) (
  F x,
  G n,
  H m
if (isUnsigned!F && isUnsigned!G && isUnsigned!H);


x base
n exponent
m modulus


x to the power n, modulo m. The return type is the largest of x's and m's type.

The function requires that all values have unsigned types.


writeln(powmod(1U, 10U, 3U)); // 1
writeln(powmod(3U, 2U, 6U)); // 3
writeln(powmod(5U, 5U, 15U)); // 5
writeln(powmod(2U, 3U, 5U)); // 3
writeln(powmod(2U, 4U, 5U)); // 1
writeln(powmod(2U, 5U, 5U)); // 2


Walter Bright, Don Clugston, Conversion of CEPHES math library to D by Iain Buclaw and David Nadlinger


Boost License 1.0.