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C# Math.Pow Method, Exponents
Use the Math.Pow method to compute exponents with 2 arguments.Math.Pow computes exponential values. It takes the powers of numbers such as by squaring values. It is a simple and convenient way to compute exponents in the C# language. There are issues related to its usage.
Example. 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. The compiler automatically converts the parameters for you if it can.Double
Parameters: The first parameter indicates the number you are trying to base the result on. The second parameter is the exponent itself.
Tip: If you are trying to square two, you will use 2, 2 as the parameters. Visual Studio provides hints on the use of parameters.
Here: The program first uses the Math.Pow method in the System namespace by calling it with common small integer parameters.
Finally: The program also cubes those small integers. The Math.Pow method returns a double type number.
C# program that uses Math.Pow method
using System;
class Program
{
static void Main()
{
//
// 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);
}
}
Output
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
Discussion. The Math.Pow method is not an extremely inefficient method. But if you can somehow cache the power number in a local variable, the execution time of your method will likely be reduced.
Note: The Math.Pow method is implemented in code external to the managed code shipped as part of the .NET Framework.
The book Code Complete by Steve McConnell shows specific optimization techniques. You can use arrays as lookup tables to cache the results of common numeric computations such as logarithms (or exponents) in your programs.
Summary. We saw the Math.Pow method, which provides a clear way to compute exponential values. The variable returned is a double type and this must be cast down to an integer if you need an integer.
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- C# Regex.Split Examples
- C# Regex Trim, Remove Start and End Spaces
- C# RegexOptions.Compiled
- C# RegexOptions.IgnoreCase Example
- C# RegexOptions.Multiline
- C# Region and endregion
- C# Remove Char From String at Index
- C# Remove Element
- C# Remove HTML Tags
- C# Remove String
- C# Reserved Filenames
- C# return Keyword
- C# Reverse String
- C# Reverse Words
- C# Reverse Extension Method
- C# RichTextBox Example
- C# Right String Part
- C# RNGCryptoServiceProvider Example
- C# ROT13 Method, Char Lookup Table
- C# SelectMany Example: LINQ
- C# Sentinel Optimization
- C# SequenceEqual Method (If Two Arrays Are Equal)
- C# Shift Operators (Bitwise)
- C# Short and ushort Types
- C# Single Method: Get Element If Only One Matches
- C# SingleOrDefault
- C# Singleton Pattern Versus Static Class
- C# Singleton Class
- C# sizeof Keyword
- C# Skip and SkipWhile Examples
- C# Sleep Method (Pause)
- C# Sort Dictionary: Keys and Values
- C# Sort by File Size
- C# Sort, Ignore Leading Chars
- C# Sort KeyValuePair List: CompareTo
- C# Sort Strings by Length
- C# Thread.SpinWait Example
- C# Math.Sqrt Method
- C# stackalloc Operator
- C# StackOverflowException
- C# StartsWith and EndsWith String Methods
- C# Static Array
- C# Static Dictionary
- C# Stopwatch Examples
- C# Stream
- C# StreamReader ReadToEnd Example (Read Entire File)
- C# StreamReader ReadToEndAsync Example (Performance)
- C# StreamReader Examples
- C# StreamWriter Examples
- C# String Append (Add Strings)
- C# String Compare and CompareTo Methods
- C# String Constructor (new string)
- C# string.Copy Method
- C# CopyTo String Method: Put Chars in Array
- C# Empty String Examples
- C# String Equals Examples
- C# String For Loop, Count Spaces in String
- C# string.Intern and IsInterned
- C# String IsUpper, IsLower
- C# String Length Property: Get Character Count
- C# String Literal: Newline and Quote Examples
- C# StringBuilder Capacity
- C# StringBuilder Clear (Set Length to Zero)
- C# StringBuilder Data Types
- C# StringBuilder Performance
- C# StringBuilder Equals (If Chars Are Equal)
- C# StringBuilder Memory
- C# StringBuilder ToString: Get String From StringBuilder
- C# StringWriter Class
- C# Sum Method: Add up All Numbers
- C# Switch Char, Test Chars With Cases
- C# Switch Enum
- C# System (using System namespace)
- C# Tag Property: Windows Forms
- C# TextInfo Examples
- C# TextReader, Returned by File.OpenText
- C# TextWriter, Returned by File.CreateText
- C# this Keyword
- C# ThreadPool
- C# Thread Join Method (Join Array of Threads)
- C# ThreadPool.SetMinThreads Method
- C# TimeZone Examples
- C# Get Title From HTML With Regex
- C# ToArray Extension Method
- C# ToCharArray: Convert String to Array
- C# ToDictionary Method
- C# Token
- C# ToList Extension Method
- C# ToLookup Method (Get ILookup)
- C# ToLower and ToUpper: Uppercase and Lowercase Strings
- ToolStripContainer Control: Dock, Properties
- C# ToolTip: Windows Forms
- C# ToString Integer Optimization
- C# ToString: Get String From Object
- C# ToTitleCase Method
- C# TrackBar: Windows Forms
- C# Tree and Nodes Example: Directed Acyclic Word Graph
- C# TreeView Tutorial
- C# Trim Strings
- C# Thread Methods
- C# History
- C# Features
- C# Variables
- C# Data Types
- C# Operators
- C# Keywords
- C# New Features | C# Version Features
- C# Programs
- C# Program to swap numbers without third variable
- C# Program to convert Decimal to Binary
- C# Program to Convert Number in Characters
- C# Program to Print Alphabet Triangle
- C# Program to print Number Triangle
- C# Program to generate Fibonacci Triangle
- C# String Compare() method
- C# String CompareOrdinal() method
- C# String CompareTo() method
- C# String Concat() method
- C# String Contains() method
- C# String CopyTo() method
- C# String EndsWith() method
- C# String Equals() method
- C# String Format() method
- C# String IndexOf() method
- C# String Insert() method
- C# String Intern(String str) method
- C# String IsInterned() method
- C# String Normalize() method
- C# String IsNullOrEmpty() method
- C# String IsNullOrWhiteSpace() method
- C# String Join() method
- C# String LastIndexOf() method
- C# String LastIndexOfAny() method
- C# String PadLeft() method
- C# String PadRight() method
- C# Nullable
- C# String Remove() method
- C# String Replace() method
- C# String Split() method
- C# String StartsWith() method
- C# String SubString() method
- C# Partial Types
- C# Iterators
- C# Delegate Covariance
- C# Delegate Inference
- C# Anonymous Types
- C# Extension Methods
- C# Query Expression
- C# Partial Method
- C# Implicitly Typed Local Variable
- C# Object and Collection Initializer
- C# Auto Implemented Properties
- C# Dynamic Binding
- C# Named and Optional Arguments
- C# Asynchronous Methods
- C# Caller Info Attributes
- C# Using Static Directive
- C# Exception Filters
- C# Await in Catch Finally Blocks
- C# Default Values for Getter Only Properties
- C# Expression Bodied Members
- C# Null Propagator
- C# String Interpolation
- C# nameof operator
- C# Dictionary Initializer
- C# Pattern Matching
- C# Tuples
- C# Deconstruction
- C# Local Functions
- C# Binary Literals
- C# Ref Returns and Locals
- C# Expression Bodied Constructors and Finalizers
- C# Expression Bodied Getters and Setters
- C# Async Main
- C# Default Expression