Difference of two set in Kotlin

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The difference of two sets A and B, denoted by A – B, is the set of all elements that are in A but not in B.

Formally, A – B = {x | x ∈ A and x ∉ B}

In other words, the difference of two sets consists of all elements that are in the first set but not in the second set.

For example, if A = {1, 2, 3} and B = {2, 3, 4}, then A – B = {1}.

To compute the difference of two sets, you can use the following algorithm:

  1. Initialize an empty set C to represent the difference of A and B.
  2. For each element x in A, check if x is not in B. If x is not in B, add it to C.
  3. The difference of A and B is now stored in C.
Kotlin
fun main() {
    val setA = setOf(1, 2, 3)
    val setB = setOf(2, 3, 4)
    val difference = setA.subtract(setB)
    println(difference)
}

This code defines two sets setA and setB and then calls the subtract function to find the difference of setA and setB. The subtract function returns a new set that contains all the elements in the first set that are not in the second set.

Output:

[1]

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