In Kotlin, finding the greatest common divisor (GCD) of two numbers can be done using recursion.
GCD is the largest positive integer that divides both of the given numbers without leaving a remainder.
In this tutorial, we will discuss how to find GCD using recursion in Kotlin.
To find GCD using recursion, we need to use the Euclidean algorithm.
The algorithm states that if we have two numbers a and b, and if a is greater than b, then the GCD of a and b is equal to the GCD of b and the remainder of a divided by b.
If a is less than b, we can swap a and b and repeat the process.
We keep repeating this process until the remainder becomes zero.
The last non-zero remainder is the GCD of the two numbers.
Here is the Kotlin program to find GCD using recursion:
fun gcd(a: Int, b: Int): Int {
return if (b == 0) {
a
} else {
gcd(b, a % b)
}
}
fun main() {
val a = 42
val b = 56
val result = gcd(a, b)
println("GCD of $a and $b is $result")
}
In this program, we have defined a function called gcd that takes two integers a and b as input parameters.
If b is equal to 0, we return a as the GCD. Otherwise, we call the gcd function recursively with the arguments b and the remainder of a divided by b.
In the main function, we have defined two integers a and b, and then we call the gcd function with these two integers as arguments.
Finally, we print the result using the println function.
We can use this program to find the GCD of any two integers in Kotlin.
We can also use it in other programs where we need to find the GCD of two numbers.
