Some programming languages, such as Python, enable variables to be declared and assigned a value in the same line of code. Constants A constant allows a value to be assigned a name.

Some programming languages, such as Python, do not support constants. Constants are used for values that are unlikely to change, for example: Pi - PI ← 3.142 ...

Variables are used to store data that can change throughout the execution of a program. You can assign a value to a variable and later change it if needed. Each system work with different variable.