Ternary Operator

Overview

Ternary operator is a simple if-else. a ? b : c means, if a is true, then b, otherwise c.

var b = a ? 10 : 20;

This expression is evaluated right to left.

Examples

Example 1. Simple use

Code

function test(a) {
    return a ? 10 : 20;
}

System.println(test(true));
System.println(test(False));    // False object.

Result

10
20

Example 2. Combination of ternary operator

Code

function test(b1, b2, b3) {
    return b1 ? b2 ? 1 : 2 : b3 ? 3 : 4;
}

System.println(test(0, 0, 0));
System.println(test(0, 0, 1));
System.println(test(0, 1, 0));
System.println(test(0, 1, 1));
System.println(test(1, 0, 0));
System.println(test(1, 0, 1));
System.println(test(1, 1, 0));
System.println(test(1, 1, 1));

Result