Math.Pow

This C# method computes exponential values. It takes the powers of numbers such as by squaring values. It receives a double argument.

Method details

Pow() is a built-in, convenient way to compute exponents in the C# language. There are issues related to its usage.

This program computes the powers of various numbers using the Math.Pow method. The parameters must be doubles or types that are convertible to double types.

using System;

//
// Compute the squares of the first parameters to Math.Pow.
//
double value1 = Math.Pow(2, 2);
double value2 = Math.Pow(3, 2);
double value3 = Math.Pow(4, 2);
double value4 = Math.Pow(5, 2);
//
// Compute the cubes of these values.
//
double value5 = Math.Pow(2, 3);
double value6 = Math.Pow(3, 3);
double value7 = Math.Pow(4, 3);
double value8 = Math.Pow(5, 3);
//
// Check some edge cases with the smallest, biggest,
// ... and special values.
//
double value9 = Math.Pow(double.MinValue, double.MaxValue);
double value10 = Math.Pow(double.MinValue, 0);
double value11 = Math.Pow(double.NaN, 2);
double value12 = Math.Pow(double.PositiveInfinity, 2);
double value13 = Math.Pow(double.NegativeInfinity, 2);
//
// Compute fractional powers.
//
double value14 = Math.Pow(2, 2.1);
double value15 = Math.Pow(Math.E, 2);
double value16 = Math.Pow(Math.PI, 1);
//
// Write results to the screen.
//
Console.WriteLine(value1);
Console.WriteLine(value2);
Console.WriteLine(value3);
Console.WriteLine(value4);
Console.WriteLine(value5);
Console.WriteLine(value6);
Console.WriteLine(value7);
Console.WriteLine(value8);
Console.WriteLine(value9);
Console.WriteLine(value10);
Console.WriteLine(value11);
Console.WriteLine(value12);
Console.WriteLine(value13);
Console.WriteLine(value14);
Console.WriteLine(value15);
Console.WriteLine(value16);
4                    Two squared.
9                    Three squared.
16                   Four squared.
25                   Five squared.
8                    Two cubed (2 * 2 * 2).
27                   Three cubed (3 * 3 * 3).
64                   Four cubed (4 * 4 * 4).
125                  Five cubed (5 * 5 * 5).
Infinity
1
NaN
Infinity
Infinity
4.28709385014517
7.38905609893065
3.14159265358979

A discussion

The Math.Pow method is not extremely slow. But if you can somehow cache the power number in a local variable, the execution time of your method will likely be reduced.

A summary

We saw the Math.Pow method, which provides a clear way to compute exponential values. The variable returned is a double type.