{"id":7257,"date":"2025-03-31T01:27:56","date_gmt":"2025-03-31T01:27:56","guid":{"rendered":"https:\/\/www.pythontutorial.net\/?page_id=7257"},"modified":"2025-03-31T01:51:34","modified_gmt":"2025-03-31T01:51:34","slug":"python-assignment-operators","status":"publish","type":"page","link":"https:\/\/www.pythontutorial.net\/python-basics\/python-assignment-operators\/","title":{"rendered":"Python Assignment Operators"},"content":{"rendered":"\n

Summary<\/strong>: in this tutorial, you’ll learn how to use the Python assignment operators to assign values to variables.<\/p>\n\n\n\n

Assignment operator #<\/a><\/h2>\n\n\n\n

In Python, you use the assignment operator to assign a value to a variable. For example, the following use the assignment operator (=) to assign number 0<\/code> to the variable count<\/code>:<\/p>\n\n\n

count = 0<\/span>\n\nprint(count)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
0<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
You can perform a calculation on a variable and assign the result back to it as follows:<\/p>\n\n\n
count = 0<\/span>\ncount = count + 1<\/span>\n\nprint(count)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
1<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
In this example, we assign 0<\/code> to the count<\/code> variable and then increment its value by one and assign it back to the count<\/code> variable.<\/p>\n\n\n\n
Note that the =<\/code> in the following expression is an assignment, not equal comparison:<\/p>\n\n\n
count = count + 1<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Compound Assignment Operators #<\/a><\/h2>\n\n\n\n
In programming, we often want to express our ideas concisely. For example, you can increment the count variable and assign its result back to the variable in one step using the compound assign operator +=:<\/p>\n\n\n
count = 0<\/span>\ncount += 1<\/span>\n\nprint(count)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
1<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
In this example, the operator += adds one to the count variable and assigns its result back to the variable:<\/p>\n\n\n
count += 1<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
It’s equivalent to the following:<\/p>\n\n\n
count = count + 1<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Here are the common compound assignment operators in Python:<\/p>\n\n\n\n
Operator<\/th>Description<\/th>a<\/th>b<\/th>Example<\/th>Equivalent To<\/th>Result<\/th><\/tr><\/thead>
+=<\/code><\/td>Add and Assign<\/td>5<\/td>2<\/td>a += b<\/code><\/td>a = a + b<\/code><\/td>7<\/code><\/td><\/tr>
-=<\/code><\/td>Subtract and Assign<\/td>5<\/td>2<\/td>a -= b<\/code><\/td>a = a - b<\/code><\/td>3<\/code><\/td><\/tr>
*=<\/code><\/td>Multiply and Assign<\/td>5<\/td>2<\/td>a *= b<\/code><\/td>a = a * b<\/code><\/td>10<\/code><\/td><\/tr>
\/=<\/code><\/td>Divide and Assign<\/td>5<\/td>2<\/td>a \/= b<\/code><\/td>a = a \/ b<\/code><\/td>2.5<\/code><\/td><\/tr>
\/\/=<\/code><\/td>Floor Divide and Assign<\/td>5<\/td>2<\/td>a \/\/= b<\/code><\/td>a = a \/\/ b<\/code><\/td>2<\/code><\/td><\/tr>
%=<\/code><\/td>Modulus and Assign<\/td>5<\/td>2<\/td>a %= b<\/code><\/td>a = a % b<\/code><\/td>1<\/code><\/td><\/tr>
**=<\/code><\/td>Exponentiate and Assign<\/td>5<\/td>2<\/td>a **= b<\/code><\/td>a = a ** b<\/code><\/td>25<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Add and Assign (+=) #<\/a><\/h3>\n\n\n\n
The add and assign operator (+=<\/code> ) allows you to add a value to a variable and assign the result back to it. For example:<\/p>\n\n\n
count = 0<\/span>\ncount += 1<\/span>  # Same as: count = count + 1<\/span>\n\nprint(count)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
1<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Subtract and Assign (-=) #<\/a><\/h3>\n\n\n\n
The subtract and assign operator (-=<\/code>) allows you to subtract a value from a variable and assigns the result back to the variable:<\/p>\n\n\n
quantity = 5<\/span>\nquantity -= 2<\/span>  # Same as: quantity = quantity- 2<\/span>\n\nprint(quantity)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
3<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Multiply and Assign (*=) #<\/a><\/h3>\n\n\n\n
The multiply and assign operator ( *=<\/code> ) operator allows you to multiply a number and assigns the result back to the variable:<\/p>\n\n\n
a = 10<\/span>\na *= 2<\/span>  # Same as: a = a * 2<\/span>\n\nprint(a)  # Output: 20<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
20<\/code><\/span><\/pre>\n\n\n
Divide and Assign (\/=) #<\/a><\/h3>\n\n\n\n
The divide and assign operator ( \/=<\/code> ) allows you to divide and assign the result:<\/p>\n\n\n
amount = 25<\/span>\namount \/= 2<\/span> # same as amount = amount \/ 2<\/span>\n\nprint(amount)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
12.5<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Floor Divide and Assign (\/\/=) #<\/a><\/h3>\n\n\n\n
The floor divide and assign operator ( \/\/=<\/code> ) allows you to perform integer division<\/strong> and assign a value back:<\/p>\n\n\n
amount = 10<\/span>\namount \/\/= 3<\/span>  # Same as: amount = amount \/\/ 3<\/span>\n\nprint(amount)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
3<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Modulus and Assign (%=) #<\/a><\/h3>\n\n\n\n
The modulus and assign operator ( %=<\/code>) calculates the remainder and assigns it to a variable:<\/p>\n\n\n
amount = 10<\/span>\namount %= 3<\/span>\n\nprint(amount)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
1<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Exponentiate and Assign (**=) #<\/a><\/h3>\n\n\n\n
The exponentiate and assign operator (**=<\/code> ) allows you to raise a number to a power and assign the result back:<\/p>\n\n\n
a = 2<\/span>\na **= 3<\/span>  # Same as: a = a ** 3<\/span>\nprint(a)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
8<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Summary #<\/a><\/h2>\n\n\n\n
Try it<\/a><\/p>\n\n\n\n
Try it<\/a><\/p>\n\n\n\n
Try it<\/a><\/p>\n\n\n\n
Try it<\/a><\/p>\n\n\n\n
Try it<\/a><\/p>\n\n\n\n
Try it<\/a><\/p>\n\n\n\n
Try it<\/a><\/p>\n\n\n\n
Try it<\/a><\/p>\n\n\n\n
In Python, the equal operator that compares two values is ==<\/code>. You’ll learn it in the comparison operators<\/a> tutorial.<\/p>\n\n\n\n
Try it<\/a><\/p>\n\n\n\n
Try it<\/a><\/p>\n\n\n\n