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What does "call" mean and do? How would you "call" a function in Python?
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00:05 To call a function—to use a function, or invoke, are other terms that we use—you simply give the name of the function and then, followed in parentheses, argument values—if any—that are needed.
A return statement effectively ends a function; that is, when the Python interpreter executes a function's instructions and reaches the return , it will exit the function at that point.
Once we have defined a function, we can call it from another function, program, or even the Python prompt. To call a function we simply type the function name with appropriate parameters. >>> greet('Paul') Hello, Paul.
When you call a function you are telling the computer to run (or execute) that set of actions. A function definition can be provided anywhere in your code - in some ways the function definition lives independently of the code around it. It actually doesn't matter where you put a function definition.
When you "call" a function you are basically just telling the program to execute that function. So if you had a function that added two numbers such as:
def add(a,b):
return a + b
you would call the function like this:
add(3,5)
which would return 8. You can put any two numbers in the parentheses in this case. You can also call a function like this:
answer = add(4,7)
Which would set the variable answer equal to 11 in this case.
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