Example 1: Find Largest Among three numbers using if..else statement

1. fun main(args: Array<String>) {
3. val n1 = -4.5
4. val n2 = 3.9
5. val n3 = 2.5
7. if (n1 >= n2 && n1 >= n3)
8. println("$n1 is the largest number.")
9. else if (n2 >= n1 && n2 >= n3)
10. println("$n2 is the largest number.")
11. else
12. println("$n3 is the largest number.")
13. }

When you run the program, the output will be:

3.9 is the largest number.

In the above program, three numbers -4.5, 3.9 and 2.5 are stored in variables n1, n2 and n3 respectively.

Then, to find the largest, the following conditions are checked using if else statements

• If n1 is greater or equals to both n2 and n3, n1 is the greatest.
• If n2 is greater or equals to both n1 and n3, n2 is the greatest.
• Else, n3 is the greatest.

The greatest number can also be found using a when statement.

Example 2: Find the largest number among three using when statement

1. fun main(args: Array<String>) {
3. val n1 = -4.5
4. val n2 = 3.9
5. val n3 = 5.5
7. when {
8. n1 >= n2 && n1 >= n3 -> println("$n1 is the largest number.")
9. n2 >= n1 && n2 >= n3 -> println("$n2 is the largest number.")
10. else -> println("$n3 is the largest number.")
11. }
12. }

When you run the program, the output will be:

5.5 is the largest number.

In the above program, instead of using an if..else if..else block, we use when statement.

So, the above conditions in both the programs are the same.