Syntax error Kotlin Program to Swap Two Numbers

Kotlin Program to Swap Two Numbers

In this article, we will understand how to how to swap two numbers in Kotlin. This is done using a temporary variable.

Below is a demonstration of the same

Suppose our input is

val1 : 45
val2 : 60

The desired output would be

val1 : 60
val2 : 45

Algorithm

  • Step 1 ? Start

  • Step 2 ? Declare three integers: val1, val2 and tempVal

  • Step 3 ? Define the values

  • Step 4 ? Assign val1 to temporary variable

  • Step 5 ? Assign val2 to val1

  • Step 6 ? Assign temporary tempVal variable to val2

  • Step 7 ? Display the two values

  • Step 8 ? Stop

Example 1

In this example, we will swap two numbers using a temporary variable ?


fun main() {
   var val1 = 45
   var val2 = 60

   println("The first value is defined as: $val1")
   println("The second value is defined as: $val2")

   val tempVal = val1
   val1 = val2
   val2 = tempVal

   println("
After swapping")
   println("The first value is = $val1")
   println("The second value is = $val2")
}

Output

The first value is defined as: 45
The second value is defined as: 60

After swapping
The first value is = 60
The second value is = 45

Example 2

In this example, we will swap two numbers without using a temporary variable ?


fun main() {
   var val1 = 25
   var val2 = 55
   
   println("The first value is defined as: $val1")
   println("The second value is defined as: $val2")

   val1 = val1 + val2
   val2 = val1 - val2
   val1 = val1 - val2

   println("
After swapping")
   println("
The first value is = $val1")
   println("The second value is = $val2")
}

Output

The first value is defined as: 25
The second value is defined as: 55

After swapping
The first value is = 55
The second value is = 25

Example 3

We can also swap two numbers using the following code


fun main() {
   var val1 = 20
   var val2 = 10

   println("The first value is defined as: $val1")
   println("The second value is defined as: $val2")

   val1 = val1 - val2
   val2 = val1 + val2
   val1 = val2 - val1

   println("
After swapping")
   println("
The first value is = $val1")
   println("The second value is = $val2")
}

Output

The first value is defined as: 20
The second value is defined as: 10

After swapping

The first value is = 10
The second value is = 20
Updated on: 2022-10-13T12:26:30+05:30

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