{"id":23080,"date":"2021-11-01T11:05:00","date_gmt":"2021-11-01T11:05:00","guid":{"rendered":"https:\/\/www.askpython.com\/?p=23080"},"modified":"2021-11-18T15:14:07","modified_gmt":"2021-11-18T15:14:07","slug":"plus-equal-operator","status":"publish","type":"post","link":"https:\/\/www.askpython.com\/python\/examples\/plus-equal-operator","title":{"rendered":"The += Operator In Python – A Complete Guide"},"content":{"rendered":"\n

In this lesson, we will look at the += operator <\/strong>in Python and see how it works with several simple examples. <\/p>\n\n\n\n

The operator ‘+=’ is a shorthand for the addition assignment operator<\/strong>. It adds two values and assigns the sum to a variable (left operand).<\/p>\n\n\n\n

Let’s look at three instances to have a better idea of how this operator works.<\/p>\n\n\n\n

\n\n\n\n

1. Adding Two Numeric Values With += Operator<\/h2>\n\n\n\n

In the code mentioned below, we have initialized a variable X with an initial value of 5 and then add value 15 to it and store the resultant value in the same variable X.<\/p>\n\n\n

\nX = 5\nprint("Value Before Change: ", X)\nX += 15\nprint("Value After Change: ", X)\n<\/pre><\/div>\n\n\n
The output of the Code is as follows:<\/p>\n\n\n
\nValue Before Change:  5\nValue After Change:  20\n<\/pre><\/div>\n\n\n
\n\n\n\n
2. Adding Two Strings <\/h2>\n\n\n
\nS1 = "Welcome to "\nS2 = "AskPython"\n\nprint("First String : ", S1)\nprint("Second String: ", S2)\nS1+=S2\nprint("Final String: ", S1)\n<\/pre><\/div>\n\n\n
In the code mentioned above, we initialized two variables S1 and S2 with initial values as \u201cWelcome to \u201d and \u201dAskPython\u201d respectively.<\/p>\n\n\n\n
We then add the two strings using the \u2018+=\u2019 operator which will concatenate the values of the string.<\/p>\n\n\n\n
The output of the code is as follows:<\/p>\n\n\n
\nFirst String :  Welcome to \nSecond String:  AskPython\nFinal String:  Welcome to AskPython\n<\/pre><\/div>\n\n\n
\n\n\n\n
3. Understanding Associativity of “+=” operator in Python<\/h2>\n\n\n\n
The associativity property of the \u2018+=\u2019 operator is from right to left.  Let’s look at the example code mentioned below.<\/p>\n\n\n
\nX = 5\nY = 10\nX += Y>>1\nprint(X)\n<\/pre><\/div>\n\n\n
We initialized two variables X and Y with initial values as 5 and 10 respectively. In the code, we right shift the value of Y by 1 bit and then add the result to variable X and store the final result to X.<\/p>\n\n\n\n
The output comes out to be X = 10 and Y = 10.<\/p>\n\n\n\n
\n\n\n\n
Conclusion<\/strong><\/h2>\n\n\n\n
Congratulations! You just learned about the ‘+=’ operator in python and also learned about its various implementations.<\/p>\n\n\n\n
Liked the tutorial? In any case, I would recommend you to have a look at the tutorials mentioned below:<\/p>\n\n\n\n
  1. The \u201cin\u201d and \u201cnot in\u201d operators in Python<\/a><\/li>
  2. Python \/\/ operator \u2013 Floor Based Division<\/a><\/li>
  3. Python Not Equal operator<\/a><\/li>
  4. Operator Overloading in Python<\/a><\/li><\/ol>\n\n\n\n
    Thank you for taking your time out! Hope you learned something new!! 😄<\/p>\n\n\n\n
    \n","protected":false},"excerpt":{"rendered":"
    In this lesson, we will look at the += operator in Python and see how it works with several simple examples. The operator ‘+=’ is a shorthand for the addition assignment operator. It adds two values and assigns the sum to a variable (left operand). Let’s look at three instances to have a better idea […]<\/p>\n","protected":false},"author":28,"featured_media":23108,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"class_list":["post-23080","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-examples"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/www.askpython.com\/wp-json\/wp\/v2\/posts\/23080","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.askpython.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.askpython.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.askpython.com\/wp-json\/wp\/v2\/users\/28"}],"replies":[{"embeddable":true,"href":"https:\/\/www.askpython.com\/wp-json\/wp\/v2\/comments?post=23080"}],"version-history":[{"count":0,"href":"https:\/\/www.askpython.com\/wp-json\/wp\/v2\/posts\/23080\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.askpython.com\/wp-json\/wp\/v2\/media\/23108"}],"wp:attachment":[{"href":"https:\/\/www.askpython.com\/wp-json\/wp\/v2\/media?parent=23080"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.askpython.com\/wp-json\/wp\/v2\/categories?post=23080"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.askpython.com\/wp-json\/wp\/v2\/tags?post=23080"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}