{"id":4154,"date":"2023-10-24T18:59:26","date_gmt":"2023-10-24T13:29:26","guid":{"rendered":"https:\/\/python-programs.com\/?p=4154"},"modified":"2023-11-10T11:56:58","modified_gmt":"2023-11-10T06:26:58","slug":"remove-last-n-characters-from-string-in-python","status":"publish","type":"post","link":"https:\/\/python-programs.com\/remove-last-n-characters-from-string-in-python\/","title":{"rendered":"Remove Last N Characters from String in Python"},"content":{"rendered":"<p>Strings are one of the most commonly used types in Python. We can easily make them by enclosing characters in quotes. Python considers single quotes to be the same as double quotes. String creation is as easy as assigning a value to a variable.<\/p>\n<p>Given a string, the task is to remove last n characters from string.<\/p>\n<p><strong>Examples:<\/strong><\/p>\n<p><strong>Input:<\/strong><\/p>\n<pre>string=\"BTechGeeks\" n=3<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre>BTechGe<\/pre>\n<h2>Remove Last N Characters from String<\/h2>\n<p>There are several ways to remove last n characters from string some of them are:<\/p>\n<ul>\n<li><a href=\"#Using_slicing\">Using slicing<\/a><\/li>\n<li><a href=\"#Using_for_loop\">Using for loop<\/a><\/li>\n<li><a href=\"#Using_regex_to_remove_first_two_characters\">Using regex to remove last two characters<\/a><\/li>\n<\/ul>\n<h3 id=\"Using_slicing\">Method #1:Using slicing<\/h3>\n<p>It returns the characters of the string as a new string from index position start to end -1. The default values for start and end are 0 and Z, where Z is the length of the string. If neither start nor end are specified, it selects all characters in the string, from 0 to size-1, and creates a new string from those characters.<\/p>\n<p>This slicing technique can be used to cut out a piece of string that includes all characters except the last N characters.<\/p>\n<p><strong>Below is the implementation:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># function which removes last n characters of string\r\ndef removeLastN(string, n):\r\n    # calculate the size of string\r\n    size = len(string)\r\n    # removing last n characters of string\r\n    string = string[:size-n]\r\n    # return the string\r\n    return string\r\n\r\n\r\n# given string\r\nstring = \"BTechGeeks\"\r\n# given n\r\nn = 3\r\n# passing string and n to removeLastN function\r\nprint(removeLastN(string, n))\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">BTechGe<\/pre>\n<h3 id=\"Using_for_loop\">Method #2 : Using for loop<\/h3>\n<p>To delete the last N characters from a string, we can iterate through the string\u2019s characters one by one, selecting all characters from index position 0 until the size &#8211; n of the string.<\/p>\n<p><strong>Below is the implementation:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># function which removes last n characters of string\r\ndef removeLastN(string, n):\r\n    # taking a empty string\r\n    newstr = \"\"\r\n    # removing last n characters of string using for loop\r\n    # Traverse the string from 0 to sizr-n\r\n    for i in range(0, len(string)-n):\r\n        newstr = newstr+string[i]\r\n\r\n    # return the string\r\n    return newstr\r\n\r\n\r\n# given string\r\nstring = \"BTechGeeks\"\r\n# given n\r\nn = 3\r\n# passing string and n to removelastN function\r\nprint(removeLastN(string, n))\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">BTechGe<\/pre>\n<h3 id=\"Using_regex_to_remove_first_two_characters\">Method #3 :Using regex to remove last two characters<\/h3>\n<p>In Python, we can use regex to match two groups in a string, i.e.<\/p>\n<p>Group 1: The first N characters in a string<br \/>\nGroup 2 consists of every character in the string except the first N characters.<br \/>\nThe string is then modified by replacing both groups with a single group, group 1.<\/p>\n<p><strong>Below is the implementation:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">import re\r\n\r\ndef removeGroup(k):\r\n    # Only group 1 should be returned from the match object.\r\n        # Other groups should be deleted.\r\n    return k.group(1)\r\n\r\n# given string\r\nstring = \"BTechGeeks\"\r\nresult = re.sub(\"(.*)(.{2}$)\", removeGroup, string)\r\nprint(result)\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">BTechGee<\/pre>\n<p>&nbsp;<br \/>\n<strong>Related Programs<\/strong>:<\/p>\n<ul>\n<li><a href=\"https:\/\/python-programs.com\/remove-first-n-characters-from-string-in-python\/\">remove first n characters from string in python<\/li>\n<li><a href=\"https:\/\/python-programs.com\/python-how-to-get-last-n-characters-in-a-string\/\">python how to get last n characters in a string<\/li>\n<li><a href=\"https:\/\/python-programs.com\/python-how-to-get-first-n-characters-in-a-string\/\">python how to get first n characters in a string<\/li>\n<li><a href=\"https:\/\/python-programs.com\/python-how-to-remove-characters-from-a-string-by-index\/\">python how to remove characters from a string by index<\/li>\n<li><a href=\"https:\/\/python-programs.com\/python-remove-characters-from-string-by-regex-4-other-ways\/\">python remove characters from string by regex 4 other ways<\/li>\n<li><a href=\"https:\/\/python-programs.com\/python-program-to-form-a-new-string-made-of-the-first-2-and-last-2-characters-from-a-given-string\/\">python program to form a new string made of the first 2 and last 2 characters from a given string<\/li>\n<li><a href=\"https:\/\/python-programs.com\/python-program-to-remove-the-characters-of-odd-index-values-in-a-string\/\">python program to remove the characters of odd index values in a string<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Strings are one of the most commonly used types in Python. We can easily make them by enclosing characters in quotes. Python considers single quotes to be the same as double quotes. String creation is as easy as assigning a value to a variable. Given a string, the task is to remove last n characters &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/python-programs.com\/remove-last-n-characters-from-string-in-python\/\"> <span class=\"screen-reader-text\">Remove Last N Characters from String in Python<\/span> Read More &raquo;<\/a><\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[5],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v18.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Remove Last N Characters from String in Python - Python Programs<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/python-programs.com\/remove-last-n-characters-from-string-in-python\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Remove Last N Characters from String in Python - Python Programs\" \/>\n<meta property=\"og:description\" content=\"Strings are one of the most commonly used types in Python. 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