variables.md

Back

Variables

---

• Variables are containers for storing data values.
• Unlike other programming languages, Python has no command for declaring a variable.
• A variable is created the moment you first assign a value to it.

Example:

z = 5
y = "John"

x = 4 # x is of type int
x = "Sally" # x is now of type str

Variable Names

• A variable can have a short name (like x and y) or a more descriptive name (age, carname, total_volume). Rules for Python variables:
• A variable name must start with a letter or the underscore character
• A variable name cannot start with a number
• A variable name can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ )
• Variable names are case-sensitive (age, Age and AGE are three different variables)

Assign Value to Multiple Variables

x, y, z = "Orange", "Banana", "Cherry"

Same value to multiple variables in one line:

x, y, z = "Orange"

To combine both text and a variable, Python uses the + character:

x = "awesome"
print("Python is " + x)

x = "Python is "
y = "awesome"
z =  x + y