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Equality checks in Kotlin (Difference between "==" and "===" Operators)
Kotlin is statistically typed language and it is hundred percent comparable with Java, as it was developed based on JVM. In Kotlin, there are two types of equality checks −
One is denoted by "==" and
The other one is denoted by "===".
As per the official documentation, "==" is used for structural equality, whereas "===" is used for referential equality.
For any expression,
a==b will evaluate to True only when the value of both "a" and "b" are equal.
a===b will evaluate to True only when both "a" and "b" are pointing to the same object.
Example – Equality in Kotlin
In this example, we will demonstrate how these two operators ("==" and "===") work.
fun main(args: Array<String>) {
val student1 = "Ram"
val student2 = "shyam"
val student4 = "Ram"
val student3=student1
// prints true as both pointing to the same object
println(student1 === student3)
// prints false
println(student1 === student2)
//prints true
println(student1 == student4)
}Output
On execution, it will produce the following output −
true false true
Updated on: 01-Mar-2022
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