Python Functions from Mohammed Sikander Show
Functions in python slide share from Devashish Kumar Happy Birthday Example: Function Flow # happy.py # Simple illustration of functions. def happy(): print 'Happy Birthday to you!' def sing(person): happy() happy ... – PowerPoint PPT presentation
Transcript and Presenter's Notes
1
3 Why Write Functions?
4 Happy Birthday Example Function Flow
5 Functions Formal vs. Actual Paramaters (and Arguments) Formal Parameters
Function definition Actual parameters or arguments Call or invocation of function Arguments must be in correct order according to function definition 6 Functions Return values
Formal parameter Return value 7 Return value used as argument Example of calculating a hypotenuse
8 Triangle2.py example
9 Returning more than one value
10 Modifying Parameters How could this be?
11 Function call that fails to get a value back
12 Function call that gets a return value
13 Changing parameter values by reference
14 Passing parameters by value
15 Changing passed parameters
16 Changing parameters passed as objects
17 Summary passing parameters
18 Program Structure
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In Python, you define a function with the def keyword, then write the function identifier (name) followed by parentheses and a colon. The next thing you have to do is make sure you indent with a tab or 4 spaces, and then specify what you want the function to do for you.
What are the basic functions in Python?Python Built-in Functions. print( ) function.. type( ) function.. input( ) function.. abs( ) function.. pow( ) function.. dir( ) function.. sorted( ) function.. max( ) function.. |