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Assignment operators are used to store a value in a variable.
The most basic assignment operator in Python is:
For example:
This means:
20 in the variable age.You can then use the variable:
Output:
= means "put this value into this variable."Look at this example:
You can think of it like this:
The value "Rahul" is stored in name.
Another example:
Now marks contains the value 85.
Python also provides shortcuts for updating a variable.
For example, suppose:
Now you want to add 5.
You could write:
This works perfectly.
But Python gives us a shorter way:
Both statements do the same thing.
Here are the assignment operators you will commonly see in Python:
| Operator | Meaning | Example | Same As |
|---|---|---|---|
= | Assign | x = 10 | — |
+= | Add and assign | x += 5 | x = x + 5 |
-= | Subtract and assign | x -= 5 | x = x - 5 |
*= | Multiply and assign | x *= 5 | x = x * 5 |
/= | Divide and assign | x /= 5 | x = x / 5 |
//= | Floor divide and assign | x //= 5 | x = x // 5 |
%= | Modulus and assign | x %= 5 | x = x % 5 |
**= | Power and assign | x **= 2 | x = x ** 2 |
Let's understand them one by one.
= — Basic AssignmentThe = operator assigns a value to a variable.
Now:
Another example:
Now city contains:
= is used to assign or store a value.+= — Add and AssignThe += operator adds a value to the current variable value.
Output:
It is the same as:
Initially:
Then:
Python does:
So now:
Suppose you have ₹500 and receive another ₹200:
Output:
+= means add to the current value.-= — Subtract and AssignThe -= operator subtracts a value from the current variable value.
Output:
It is the same as:
Suppose your wallet contains ₹1,000 and you spend ₹250:
Output:
-= means subtract from the current value.*= — Multiply and AssignThe *= operator multiplies the current value and stores the new result.
Output:
It is the same as:
Another example:
Output:
*= means multiply the current value./= — Divide and AssignThe /= operator divides the current value and stores the result.
Output:
It is the same as:
/= means divide the current value.//= — Floor Divide and AssignThe //= operator performs floor division and stores the result.
Output:
It is the same as:
//= means perform floor division and store the result.%= — Modulus and AssignThe %= operator finds the remainder and stores it in the variable.
Output:
It is the same as:
Because:
%= means find the remainder and store it.**= — Power and AssignThe **= operator calculates a power and stores the result.
Output:
It is the same as:
Because:
**= means raise the current value to a power.Compound assignment is useful when you want to update the same variable again and again.
For example:
Output:
The variable keeps changing:
This makes compound assignment especially useful when a value needs to be updated.
Do not confuse:
with:
For assignment, use:
The operator == is used for comparison and belongs to a different topic.
For this lesson, remember only:
= → assign a value:=)Python also has another special assignment operator:
It is called the walrus operator.
The walrus operator allows you to assign a value and use that value in the same expression.
Here:
stores 20 in age.
At the same time, the value 20 is used in the condition.
So the program prints:
The symbol:
looks a little like the eyes and tusks of a walrus.
That's why Python developers commonly call it the walrus operator.
Consider this example:
Here, the assignment and use happen separately.
With the walrus operator, assignment can happen inside an expression.
For example:
The value "Rahul" is assigned to name, and then name is used by the print() statement.
Output:
:= everywhere. Normal assignment with = is still the most common way to assign a value.= vs += vs :=These operators have different purposes.
| Operator | Simple Meaning |
|---|---|
= | Assign a value |
+= | Add and update |
-= | Subtract and update |
*= | Multiply and update |
/= | Divide and update |
//= | Floor divide and update |
%= | Find remainder and update |
**= | Calculate power and update |
:= | Assign and use the value in the same expression |
Think of them like this:
Now practice each assignment operator.
Expected output:
Expected output:
Expected output:
Expected output:
Expected output:
Expected output:
Expected output:
Start with:
Perform these updates:
Try to write the Python code using compound assignment operators.
Output:
Assignment operators are used to store and update values.
The most important operators are:
+= do?-= do?%= do?**= do?:=?Before moving to the next topic, make sure you can explain these in your own words:
Try writing a few examples yourself. The more you practice these operators, the more natural they will become.
Continue learning with hands-on practice, examples, and exercises in the upcoming topic.
| Previous Lesson | Next Lesson |
|---|---|
| Arithmetic Operators | Comparison Operators |
Test your understanding of this lesson with 9 questions. Each question has one correct answer.