If value of a parameter is already known then you can assign default values to a Python function’s parameter. Further, the default values can be specified in the function header.
For example,
def sum(x, y, z=15):
s=x+y+z
return s
In the above program, value of parameter z is 15.
If in program, function call sum(20, 30) appears i.e the third argument is missing.
Actually, function call sum(20, 30, 15) will be used and no argument is missing.
See the below program and output it output
