{"id":19046,"date":"2024-03-11T15:13:19","date_gmt":"2024-03-11T09:43:19","guid":{"rendered":"https:\/\/btechgeeks.com\/?p=19046"},"modified":"2024-03-12T16:33:09","modified_gmt":"2024-03-12T11:03:09","slug":"python-program-for-sign-change","status":"publish","type":"post","link":"https:\/\/btechgeeks.com\/python-program-for-sign-change\/","title":{"rendered":"Python Program for Sign Change"},"content":{"rendered":"<p>In the previous article, we have discussed <a href=\"https:\/\/btechgeeks.com\/python-program-to-find-the-previous-armstrong-number\/\">Python Program to Find the Previous Armstrong Number<\/a><br \/>\nGiven a String and the task is to change the &#8216;+&#8217; sign into &#8216;-&#8216; and vice versa for a given string.<\/p>\n<p><strong>Examples:<\/strong><\/p>\n<p><strong>Example1:<\/strong><\/p>\n<p><strong>Input:<\/strong><\/p>\n<pre>Given String = \"  --btech++geeks-- \"<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">The given string { --btech++geeks-- } after changing the '+' sign into '-' and vice versa = ++btech--geeks++<\/pre>\n<p><strong>Example2:<\/strong><\/p>\n<p><strong>Input:<\/strong><\/p>\n<pre>Given String = \"--1++2--3+\"<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">The given string { --1++2--3+ } after changing the '+' sign into '-' and vice versa = ++1--2++3-<\/pre>\n<ul>\n<li><a href=\"https:\/\/btechgeeks.com\/python-program-to-find-the-shortest-word-in-a-string\/\">Python Program to Find the Shortest Word in a String<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/python-program-to-remove-a-string-from-a-list-of-strings\/\">Python Program to Remove a String from a List of Strings<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/python-program-to-remove-characters-that-appear-more-than-k-times\/\">Python Program to Remove Characters that Appear More than k Times<\/a><\/li>\n<\/ul>\n<h2>Program for Sign Change in Python<\/h2>\n<p>Below are ways to change the &#8216;+&#8217; sign into &#8216;-&#8216; and vice versa for a given string\u00a0 :<\/p>\n<ul>\n<li><a href=\"#Using_For_Loop_(Static_Input)\">Using For Loop (Static Input)<\/a><\/li>\n<li><a href=\"#Using_For_loop_(User_Input)\">Using For loop (User Input)<\/a><\/li>\n<\/ul>\n<h3 id=\"Using_For_Loop_(Static_Input)\">Method #1: Using For Loop (Static Input)<\/h3>\n<p><strong>Approach:<\/strong><\/p>\n<ul>\n<li>Give the string as static input and store it in a variable.<\/li>\n<li>Take an empty string say &#8220;<strong>new_str<\/strong>&#8221; and store it in another variable.<\/li>\n<li>Loop in the given string using the for loop.<\/li>\n<li>Inside the loop, check if the iterator value is equal to &#8216;+&#8217; sign using the if conditional statement.<\/li>\n<li>If it is true, then concatenate the\u00a0 &#8216;-&#8216; sign with the <strong>new_str<\/strong> and store it in the same variable <strong>new_str.<\/strong><\/li>\n<li>Check if the iterator value is equal to the &#8216;-&#8216; sign using the elif conditional statement.<\/li>\n<li>If it is true, then concatenate the\u00a0 &#8216;+&#8217; sign with the <strong>new_str<\/strong> and store it in the same variable <strong>new_str.<\/strong><\/li>\n<li>Else concatenate the iterator value to the <strong>new_str <\/strong>and\u00a0store it in the same variable <strong>new_str.<\/strong><\/li>\n<li>Print the given string after changing the &#8216;+&#8217; sign into &#8216;-&#8216; and vice versa.<\/li>\n<li>The Exit of the program.<\/li>\n<\/ul>\n<p><strong>Below is the implementation:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># Give the string as static input and store it in a variable.\r\ngvn_str = \"32--1++4\"\r\n# Take an empty string say \"new_str\" and store it in another variable.\r\nnew_str = \"\"\r\n# Loop in the given string using the for loop.\r\nfor itr in gvn_str:\r\n  # Inside the loop, check if the iterator value is equal to '+' sign using the if\r\n    # conditional statement.\r\n    if(itr == \"+\"):\r\n        # If it is true, then concatenate the\u00a0 '-' sign with the new_str and store it in the\r\n        # same variable new_str.\r\n        new_str += \"-\"\r\n# Check if the iterator value is equal to the '-' sign using the elif conditional statement.\r\n    elif(itr == \"-\"):\r\n      # If it is true, then concatenate the\u00a0 '+' sign with the new_str and store it in the\r\n        # same variable new_str.\r\n        new_str += \"+\"\r\n    else:\r\n     # Else concatenate the iterator value to the new_str and store it in the same variable new_str.\r\n        new_str += itr\r\n# Print the given string after changing the '+' sign into '-' and vice versa.\r\nprint(\"The given string {\", gvn_str,\r\n      \"} after changing the '+' sign into '-' and vice versa =\", new_str)\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre id=\"codeOutputPre\">The given string { 32--1++4 } after changing the '+' sign into '-' and vice versa = 32++1--4<\/pre>\n<h3 id=\"Using_For_loop_(User_Input)\">Method #2: Using For loop (User Input)<\/h3>\n<p><strong>Approach:<\/strong><\/p>\n<ul>\n<li>Give the string as user input using the input() function and store it in a variable.<\/li>\n<li>Take an empty string say &#8220;<strong>new_str<\/strong>&#8221; and store it in another variable.<\/li>\n<li>Loop in the given string using the for loop.<\/li>\n<li>Inside the loop, check if the iterator value is equal to &#8216;+&#8217; sign using the if conditional statement.<\/li>\n<li>If it is true, then concatenate the\u00a0 &#8216;-&#8216; sign with the <strong>new_str<\/strong> and store it in the same variable <strong>new_str.<\/strong><\/li>\n<li>Check if the iterator value is equal to the &#8216;-&#8216; sign using the elif conditional statement.<\/li>\n<li>If it is true, then concatenate the\u00a0 &#8216;+&#8217; sign with the <strong>new_str<\/strong> and store it in the same variable <strong>new_str.<\/strong><\/li>\n<li>Else concatenate the iterator value to the <strong>new_str <\/strong>and\u00a0store it in the same variable <strong>new_str.<\/strong><\/li>\n<li>Print the given string after changing the &#8216;+&#8217; sign into &#8216;-&#8216; and vice versa.<\/li>\n<li>The Exit of the program.<\/li>\n<\/ul>\n<p><strong>Below is the implementation:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># Give the string as user input using the input() function and\r\n# store it in a variable.\r\ngvn_str = input(\"Enter some random String = \")\r\n# Take an empty string say \"new_str\" and store it in another variable.\r\nnew_str = \"\"\r\n# Loop in the given string using the for loop.\r\nfor itr in gvn_str:\r\n  # Inside the loop, check if the iterator value is equal to '+' sign using the if\r\n    # conditional statement.\r\n    if(itr == \"+\"):\r\n        # If it is true, then concatenate the\u00a0 '-' sign with the new_str and store it in the\r\n        # same variable new_str.\r\n        new_str += \"-\"\r\n# Check if the iterator value is equal to the '-' sign using the elif conditional statement.\r\n    elif(itr == \"-\"):\r\n      # If it is true, then concatenate the\u00a0 '+' sign with the new_str and store it in the\r\n        # same variable new_str.\r\n        new_str += \"+\"\r\n    else:\r\n     # Else concatenate the iterator value to the new_str and store it in the same variable new_str.\r\n        new_str += itr\r\n# Print the given string after changing the '+' sign into '-' and vice versa.\r\nprint(\"The given string {\", gvn_str,\r\n      \"} after changing the '+' sign into '-' and vice versa =\", new_str)\r\n<\/pre>\n<p><strong>Output:<\/strong><\/p>\n<pre>Enter some random String = btech++--geeks+++--\r\nThe given string { btech++--geeks+++-- } after changing the '+' sign into '-' and vice versa = btech--++geeks---++<\/pre>\n<p>Explore more instances related to python concepts from\u00a0<a href=\"https:\/\/btechgeeks.com\/python-programming-examples-with-output\/\">Python Programming Examples<\/a>\u00a0Guide and get promoted from beginner to professional programmer level in Python Programming Language.<\/p>\n<ul>\n<li><a href=\"https:\/\/btechgeeks.com\/python-program-to-compute-xn-n\/\"><span data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Python Program to Compute x^n\/n!&quot;}\" data-sheets-userformat=\"{&quot;2&quot;:4224,&quot;10&quot;:2,&quot;15&quot;:&quot;Arial&quot;}\">Python Program to Compute x^n\/n!<\/span><\/a><\/li>\n<li><span data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Python Program to Compute 1\/N!&quot;}\" data-sheets-userformat=\"{&quot;2&quot;:4224,&quot;10&quot;:2,&quot;15&quot;:&quot;Arial&quot;}\"><a href=\"https:\/\/btechgeeks.com\/python-program-to-compute-1-n\/\">Python Program to Compute 1\/N!<\/a><\/span><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/python-program-to-find-next-prime-number\/\">Program to Find Next Prime Number<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/python-program-to-find-the-next-armstrong-number\/\">Program to Find the Next Armstrong Number<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/python-program-to-find-the-previous-armstrong-number\/\">Program to Find the Previous Armstrong Number<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>In the previous article, we have discussed Python Program to Find the Previous Armstrong Number Given a String and the task is to change the &#8216;+&#8217; sign into &#8216;-&#8216; and vice versa for a given string. Examples: Example1: Input: Given String = &#8221; &#8211;btech++geeks&#8211; &#8221; Output: The given string { &#8211;btech++geeks&#8211; } after changing the &#8230; <a title=\"Python Program for Sign Change\" class=\"read-more\" href=\"https:\/\/btechgeeks.com\/python-program-for-sign-change\/\" aria-label=\"More on Python Program for Sign Change\">Read more<\/a><\/p>\n","protected":false},"author":7,"featured_media":19103,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[5],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Python Program for Sign Change - BTech Geeks<\/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:\/\/btechgeeks.com\/python-program-for-sign-change\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Python Program for Sign Change - BTech Geeks\" \/>\n<meta property=\"og:description\" content=\"In the previous article, we have discussed Python Program to Find the Previous Armstrong Number Given a String and the task is to change the &#8216;+&#8217; sign into &#8216;-&#8216; and vice versa for a given string. 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