Python Functions
Types of functions
Built-in functions (input, float, int) and functions that we define.
What's the function of arguments?
So we can direct the function to do different kinds of work when we call it at different times.
Function
Some stored code that we use. Takes an input and produces an output.
What happens when you put an integer and a floating point in an expression?
The integer is converted to a float.
Return values
The result of taking arguments from a function and doing computation. Is meant to be used as a value in the calling expression.
Argument
The value we pass into the function as its input when we call it.
Parameters
The variable used in the function definition. It allows the code to access the arguments for a particular function invocation.Ex. def greet(lang), lang is the parameter.
Uses of functions
1. Organize the code into "paragraphs". 2. D.R.Y. 3. Simplify something. 4. Automatize something commonly used.
How do we put arguments in a parentheses?
After the name of the function. Ex. big=max('Hello world'). 'Hello world' is the argument.
How does the body of a function should be?
It should be indent
Fruitful function
Produces a result or return value. The return statement ends the function execution and "sends back"the result of the function.
True or false: A function definition does not execute the body of a function.
True
Void (non-fruitful) Functions
When a function does not return a value.
How do you convert a string to an integer or float?
int() or float()
A function__a pattern.
stores
After defining a function...
we can call it as many times as we need.
