In this example you will learn how to check if a number is odd or even in R Programming.
For this program you should know about if else structure and operators in R.
An even number is defined as 2k, where k is an integer. Hence even numbers are ..., -4, -2, 0, +2, +4, ...
Odd number is defined as 2k+1, where k is an integer. Odd numbers are ..., -3, -1, +1, +3, ....
To find odd or even number we will use if else structure and also modulus or remainder operator %% which returns the remainder of an integer division. The logic is any number divisible by 2 is even. Any number which is not even is odd.
In this example the user is prompted to enter any integer. The input is taken by readline() function and it is a text which is converted to integer by as.integer() function. if else structure is used to check if the number is divisible by 2 then it is declared as an even number otherwise it is an odd number.