R Examples

R Program - Check whether a Number is Even or Odd

A number is known as an even number if it is a natural number and divisible by 2. On the other hand, an odd number is a natural number which not divisible by 2. Examples:

Even Number: -10, -4, 0, 6, 18, 50
Odd Number: -11, -5, -1, 9, 21, 99

Method 1: Using conditional statements

In the example below, the number called MyNum is checked for even number by dividing it by 2 and checking the remainder. For even number, the remainder is 0 and for odd number, the remainder is 1.

MyNum <- 17
if (MyNum %% 2 == 0) {
  cat(MyNum,"is an even number.")
} else if (MyNum %% 2 == 1) {
  cat(MyNum,"is an odd number.")
}

The above code will give the following output:

17 is an odd number.

Method 2: Using function

In the example below, a function called CheckEven() is created which takes a number as argument and checks it for even number.

CheckEven <- function(MyNum) {
  if (MyNum %% 2 == 0) {
    cat(MyNum,"is an even number.")
  } else if (MyNum %% 2 == 1) {
    cat(MyNum,"is an odd number.")  
  }
}

CheckEven(42)

The above code will give the following output:

42 is an even number.