- To swap 2 numbers without using 3rd variable
User Input
1st number: 3
2nd number: 5
After Swap, Output:
1st number : 5
2nd number : 3
import java.util.Scanner
fun main(args: Array<String>) {
print("Enter 1st number : ")
val userInput = Scanner(System.`in`)
var n1:Int = userInput.nextInt()
print("Enter 2nd number : ")
var n2:Int =userInput.nextInt()
n1=n1+n2;
n2=n1-n2;
n1=n1-n2;
print("After Swap\n 1st number : $n1 \n 2nd number : $n2")
}
Enter 1st number : 7 Enter 2nd number : 15 After Swap 1st number : 15 2nd number : 7Program
Here we are adding both values into one then used some maths
//Lets take n1=7, n2=3;
n1=n1+n2; //n1=7+3=10
n2=n1-n2; //n2=10-3=7
n1=n1-n2; //n1=10-7=3
//Finally you swaped & get n1=3, n2=7;
Concept
Coming Soon !
QuickIn order to succeed you must fail, so that you know what not to do the next time.