1.4.1
Variables & Constants
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Variables and Constants
Variables and constants allow us to store results in the main store.
Variables
- Variables are named spaces in the memory where data can be stored.
- The value of a variable is the data stored inside it.
- The value can change whilst the program is running.
Constants
- Constants are similar to variables, but the value cannot change whilst the program is running.
- Constants make the code easier to read.
Assignment
- To use a variable, we give it a name and a value. For example:
- x = 50
- We can then use this variable in other expressions by using its identifier (name).
1Introduction to Python
1.1Python
1.2Input & Output
1.3Data Types
1.4Variables & Constants
1.6Program Flow
2Data Structures
2.1Lists & Strings
2.2File Handling
3Modularity
3.1Subroutines
3.2Data Flow
4Good Practice
4.1Naming & Whitespace
4.2Comments
4.3Exceptions
Jump to other topics
1Introduction to Python
1.1Python
1.2Input & Output
1.3Data Types
1.4Variables & Constants
1.6Program Flow
2Data Structures
2.1Lists & Strings
2.2File Handling
3Modularity
3.1Subroutines
3.2Data Flow
4Good Practice
4.1Naming & Whitespace
4.2Comments
4.3Exceptions
Practice questions on Variables & Constants
Can you answer these? Test yourself with free interactive practice on Seneca — used by over 10 million students.
- 1
- 2Which symbol is used to assign values?Multiple choice
- 3What should constants be used for?Multiple choice
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