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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);

Parameters

Name	Description
x	base
n	exponent
m	modulus

Returns

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.

Example

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

Authors

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

License

Boost License 1.0.