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C# Convert Miles to Kilometers
Perform a numeric conversion from miles to kilometers. Change the units of a distance figure.Convert miles, kilometers. A figure in miles can be converted to kilometers. The United States has standardized on miles. Most other countries use the superior metric system. It is important to maintain compatibility with many cultures.Convert
Required input and output for distance conversion
Input: 200 m
321.9 km
500 km
310.7 m
Output: 321.9 km
200 m
310.7 m
500 km
Example. Here we look at some useful conversion methods for this problem. The solution consists of one static class and two methods in it. These methods are effective in converting from miles to kilometers and back again.Static
Double: Double stores numbers that are larger and have decimal places. It consumes more memory and is slower to process.
DoubleConstants: Each method here uses a constant for the conversion. For regular stuff, these are fine.
Float64: The compiler will treat these constants internally as float64 values. These are in a static class, which doesn't store state.
Tip: Static classes are just a syntactic feature of the C# language, but they help clarify the code.
C# program that converts miles and kilometers
using System;
class Program
{
static void Main()
{
//
// Convert miles to kilometers.
//
double miles1 = 200;
double kilometers1 = ConvertDistance.ConvertMilesToKilometers(200);
Console.WriteLine("{0} = {1}", miles1, kilometers1);
//
// Convert kilometers to miles.
//
double kilometers2 = 321.9;
double miles2 = ConvertDistance.ConvertKilometersToMiles(321.9);
Console.WriteLine("{0} = {1}", kilometers2, miles2);
//
// Convert kilometers to miles (again).
//
double kilometers3 = 500;
double miles3 = ConvertDistance.ConvertKilometersToMiles(500);
Console.WriteLine("{0} = {1}", kilometers3, miles3);
//
// Convert miles to kilometers (again).
//
double miles4 = 310.7;
double kilometers4 = ConvertDistance.ConvertMilesToKilometers(310.7);
Console.WriteLine("{0} = {1}", miles4, kilometers4);
}
}
public static class ConvertDistance
{
public static double ConvertMilesToKilometers(double miles)
{
//
// Multiply by this constant and return the result.
//
return miles * 1.609344;
}
public static double ConvertKilometersToMiles(double kilometers)
{
//
// Multiply by this constant.
//
return kilometers * 0.621371192;
}
}
Output
200 = 321.8688
321.9 = 200.0193867048
500 = 310.685596
310.7 = 500.0231808
Discussion. As I noted, the double type here is actually termed float64, meaning a 64-bit number. This snippet shows the ConvertKilometersToMiles method. You can see it uses the mul opcode to multiply.
Info: The ldrc.r8 opcode pushes the supplied value (the 0.621371192) onto the stack as a float.
Method implementation: IL
.method public hidebysig static float64 ConvertKilometersToMiles(float64 k)
cil managed
{
.maxstack 8
L_0000: ldarg.0
L_0001: ldc.r8 0.621371192
L_000a: mul
L_000b: ret
}
Summary. Figures in miles can be converted to km. It is interesting the extent of the loss of precision. In chemistry, there is a concept of significant digits, and that concept certainly applies here as well.
Review: We saw how the methods are converted into MSIL. We also used a static class to logically store static methods.
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- 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