PYTHON DICTIONARY

---

Comments

Data types

Variables

If Else

If Elif Else

Functions

For loop

While loop

Data structures

String slicing/indexing

User defined function

Local/Global variable

Validation and Try

Methods

File I/O

Pseudocode

Modules​

What is a Local/Global variable?

A global variable is a variable that is declared outside a user defined function.

A local variable is a variable declared inside a user defined function.
​
​In the picture to the right, variable0 is a global variable and variable1 and variable2 are local variables.

---

---

Python challenge - Local vs Global variable

Enter the following code in a Python code editor. Before running the code, what do you think it will do? Press "F5" then "Enter" to run

Try the code above, does it display the value of x on the screen? Try it again but change the print function to print(a) or print(b). What happens? The "x" variable has "global" scope while the "a" and "b" variables are local to their respective user defined functions.

---

​Python challenge - Local vs Global variable

Make the following change to the code by adding the line "global a". In this line, you are changing the scope of the variable from local to global. Make the variable "b" global and then print it's value.