A variable is a name used to store a data value in Python.
For example:
x = 10
Here, x is the variable name and it holds the value 10.
name = "sam"
Here, name is the variable name and it holds the text sam.
Why do we need variables?
Variables are not a necessity, but without variables, it becomes hard to read, write, or change Python code.
Example
Without variables:
print(10 + 10)
print(10 - 5)
With variables:
x = 10
print(x + x)
print(x - 5)
Now, if we want to use the value 10 anywhere, we can use x. And if we need to change the value from 10 to 15 everywhere, we just need to update the value of x:
x = 15
print(x + x)
print(x - 5)
Here, we are using the value stored in x in different places and also changing it when needed.
Conclusion
A variable is a name used to store a data value, such as numbers, text, or objects, which can be used and modified during program execution.
Important Note
When writing a text (string) variable, you can use single quotes ('text'), double quotes ("text"), or triple quotes ('''text''' or """text""").
x = 'sam'
y = "sam"
z = '''sam'''
z2 = """sam"""
print(x, y, z, z2)
However, generally everyone uses double quotes ("text").