Even numbers are those numbers that are exactly divisible by 2.
The remainder operator % gives the remainder when used with a number. For example,
const number = 6;
const result = number % 4; // 2
Hence, when % is used with 2, the number is even if the remainder is zero. Otherwise, the number is odd.
Example 1: Using if...else
Output
Enter a number: 27 The number is odd.
In the above program, number % 2 == 0 checks whether the number is even. If the remainder is 0, the number is even.
In this case, 27 % 2 equals to 1. Hence, the number is odd.
The above program can also be written using a ternary operator.
Example 2: Using Ternary Operator
Output
Enter a number: 5 The number is odd.