Kotlin If OR

In this tutorial, you shall learn how to use OR logical operator in the condition of If-statement in Kotlin, with examples.

Kotlin If with OR Operator

The condition in the If-statement must be a boolean expression or anything that can evaluate to a Boolean value. And this boolean expression can be a compound condition that contains multiple conditions joined by logical operators.

The following is a simple scenario where two simple conditions are joined with Logical OR Operator to form a compound boolean condition.

if (condition1 || condition2) {
    //code
}

The truth table for the result of this compound condition or expression is

condition1	condition2	condition1 || condition2
true	true	true
true	false	true
false	true	true
false	false	false

Example

In the following Kotlin program, we have an integer value in a. We shall check if this integer is greater than 100 or if this number even.

The expression to check if a is greater than 100, is a > 100.

The expression to check if a is even is a%2 == 0.

We shall join these two simple boolean conditions using OR operator || to form a compound boolean condition.

Main.kt

fun main(args: Array<String>) {
    val a = 10
    if ( (a > 100) || (a%2 == 0) ) {
        print("$a is greater than 100 or even number.")
    }
}

Output

10 is greater than 100 or even number.

Conclusion

In this Kotlin Tutorial, we learned how to use Logical OR Operator in If-statement’s boolean condition, with the help of example programs.