Variables

Variables are the containers that stores the values. Python is not "statically-typed". It is the basic unit of storage in a program.

Variable Name Rules

• Must start with a letter or underscore
• Case Sensitive
• Must consist of letters, numbers or underscores

Good: spam, eggs, spam23, _speed Bad: 23spam, #sign, var.12 Different: spam, Spam, SPAM

Example:

name = "tmleyncodes"
print(name)

Sentences or Lines

x = 2 # Assign Statement
x = x + 2 # Assign with expession
print(x) # Print Statement

NOTES:

• The value stored in a variable can be changed during program execution.
• A Variables in Python is only a name given to a memory location, all the operations done on the variable effects that memory location.

Valid Variable Name:

geeks = 1
print(geeks)

Geeks = 2
print(Geeks)

Ge_e_ks = 5
print(Ge_e_ks)

_geeks = 6
print(_geeks)

geeks_ = 7
print(geeks_)

_GEEKS_ = 8
print(_GEEKS_)

Assigning the Variables

# A Integer Variable
age = 45
# A Floating Variable
salary = 10000.79
# A String Variable
name = "John"

# Declaring a Variable
num = 100

# Re-declaring a variable
num = 101

# Multi-Assignments
a = b = c = 10

age, salary, name = 45, 10000.79, "John"