R If Else.

• If statement is written with the if keyword, and it is used to specify a block of code to be executed if a condition is TRUE.
• Else statement is executed, if condition is not true and hence if section will not be executed instead else will be.

    Example - 

    a < 10

    b < 20

    if (b < a) {

    print("a is greater than b")

    }