Description of user defined methods

i)welcomeUser

has no formal input parameters

has no return

displays a welcome message

ii)addNum

accepts two integers

returns the addition of the two numbers as an int

iii)subNum

accepts two integers

returns the subtraction of the two numbers as an int

iv)mulNum

accepts two double

returns the multiplication of the two numbers as double

v)divNum

accepts two double

returns the division of the two numbers as double

vi)byeUser

no formal parameter

has no return