What is the difference between the formal parameters and actual parameters? What are their alternative names?

Q. What is the difference between the formal parameters and actual parameters? What are their alternative names? Also, give a suitable Python code to illustrate both.

Answer :-

Actual Parameter is a parameter, which is used in function call statement to send the value from calling function to the called function. It is also known as Argument.

Formal Parameter is a parameter, which is used in function header of the called function to receive the value from actual parameter. It is also known as Parameter.

For example :-

def addEm(x, y, z):
    print(x + y + z)
addEm(6, 16, 26)

In the above code, actual parameters are 6, 16 and 26; and formal parameters are x, y and z.