Q. Write an algorithm and program to swap two numbers without using temporary variable.
Solution : We can swap two numbers without using temporary variable. By using + and - operator we can swap two number.
Swapping two number :- Swap two numbers means exchange the values of two variables with each other.
For example:
Before Swapping : num1 = 10 and num2 = 20.
After Swapping : num1 = 20 and num2 = 10.
Swap two numbers without using third variable algorithm
//Algorithm To Swap Two Numbers Without Temporary Variable START Step 1 -> Take two integer as input num1 and num2. Step 2 -> Print number before swapping Step 3 -> num1 = num1 + num2; Step 4 -> num2 = num1 - num2; Step 5 -> num1 = num1 - num2; Step 6 -> Print numbers after swapping STOP
Swap Two Numbers Without Using Temporary Variable Program
//C Program To Swap Two Numbers Without Temporary Variable. #include <stdio.h> int main() { int num1,num2; printf("Enter Two Numbers :\n"); scanf("%d %d",&num1,&num2); printf("Number before swapping is %d and %d \n",num1,num2); num1=num1+num2; num2=num1-num2; num1=num1-num2; printf("Number after swapping is %d and %d \n",num1,num2); return 0; }
//C++ Program To Swap Two Numbers Without Temporary Variable. #include <iostream> using namespace std; int main() { int num1,num2; cout<<"Enter Two Numbers :\n"; cin>>num1>>num2; cout<<"Number before swapping is "<<num1<<" and "<<num2<<"\n"; num1=num1+num2; num2=num1-num2; num1=num1-num2; cout<<"Number after swapping is "<<num1<<" and "<<num2; return 0; }
//Java Program To Swap Two Numbers Without Temporary Variable. import java.util.Scanner; public class LFC { public static void main(String[] args) { Scanner scan = new Scanner(System.in); System.out.print("Enter Two Numbers :"); int num1 = scan.nextInt(); int num2 = scan.nextInt(); System.out.println("Number before swapping is "+num1+" and "+num2); num1=num1+num2; num2=num1-num2; num1=num1-num2; System.out.println("Number after swapping is "+num1+" and "+num2); } }
//Python Program To Swap Two Numbers Without Temporary Variable. print('Enter Two Numbers :') num1 = int(input()) num2 = int(input()) print("Number before swapping is ",num1," and ",num2) num1 = num1 + num2; num2 = num1 - num2; num1 = num1 - num2; print("Number after swapping is ",num1," and ",num2)
//C# Program To Swap Two Numbers Without Temporary Variable. using System; class LFC { static void Main() { int num1=10,num2=15; Console.WriteLine("Number before swapping is "+num1+" and "+num2); num1=num1+num2; num2=num1-num2; num1=num1-num2; Console.WriteLine("Number After swapping is "+num1+" and "+num2); } }
//PHP Program To Swap Two Numbers Without Temporary Variable. <?php $num1=10; $num2=20; echo "Number before swapping is $num1 and $num2 \n"; $num1=$num1+$num2; $num2=$num1-$num2; $num1=$num1-$num2; echo "Number after swapping is $num1 and $num2"; ?>
//C Program To Swap Two Numbers Without Temporary Variable. #include <stdio.h> int main() { int num1,num2; printf("Enter two numers : \n"); scanf("%d %d",&num1,&num2); printf("Number before swapping is %d and %d \n",num1,num2); num1=num1+num2; num2=num1-num2; num1=num1-num2; printf("Number after swapping is %d and %d \n",num1,num2); return 0; }
Output
Enter Two Numbers : 10 15 Number before swapping is 10 and 15 Number after swapping is 15 and 10
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