Parameter names vs. argument names

Most of the time, parameters and variable arguments will have different names. For example, take a look at this code.

def add_numbers(num1,num2):
    return num1 + num2

x = 1
y = 100
print(add_numbers(x,y))

The arguments are the variables x and y, and the parameters are num1 and num2. It is relatively straightforward to follow that the argument x is passed into the parameter num1 when add_numbers() is called, and similarly y is passed into num2.