C# Program to Swap Two Numbers
C# Program to Swap Two Numbers
In programming, there are two different techniques to swap any two numbers in a variable, they are
- Swap using Temporary Variable
- Swap without using Temporary Variable
Swap using Temporary Variable
In the following example, we will swap two numbers (25 and 50) using a temporary variable (temp).
Example
using System;
namespace myApp
{
class Program
{
static void Main(string[] args)
{
int num1 = 25;
int num2 = 50;
int temp = 0;
temp = num1;
num1 = num2;
num2 = temp;
Console.WriteLine("After swapping...");
Console.WriteLine("num1 = {0}", num1);
Console.WriteLine("num2 = {0}", num2);
}
}
}
Output
After swapping...
num1 = 50
num2 = 25
Swap without using Temporary Variable
In the following example, we will swap two numbers (25 and 50) without using a temporary variable.
Example
using System;
namespace myApp
{
class Program
{
static void Main(string[] args)
{
int num1 = 25;
int num2 = 50;
num1 = num1 - num2;
num2 = num1 + num2;
num1 = num2 - num1;
Console.WriteLine("After swapping...");
Console.WriteLine("num1 = {0}", num1);
Console.WriteLine("num2 = {0}", num2);
}
}
}
Output
After swapping...
num1 = 50
num2 = 25
Swap any Two Given Numbers
In the following example, we will swap any two given numbers without using a temporary variable (temp).
Example
using System;
namespace myApp
{
class Program
{
static void Main(string[] args)
{
int temp = 0;
Console.Write("Enter (int) Number1: ");
int num1 = Convert.ToInt32(Console.ReadLine());
Console.Write("Enter (int) Number2: ");
int num2 = Convert.ToInt32(Console.ReadLine());
temp = num1;
num1 = num2;
num2 = temp;
Console.WriteLine("\nAfter swapping...");
Console.WriteLine("num1 = {0}", num1);
Console.WriteLine("num2 = {0}", num2);
}
}
}
Output
Enter (int) Number1: 25
Enter (int) Number2: 36
After swapping...
num1 = 36
num2 = 25
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