{"id":16567,"date":"2022-10-20T05:44:18","date_gmt":"2022-10-20T00:14:18","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-java-preincrement-and-postincrement-operators\/"},"modified":"2022-10-20T05:44:18","modified_gmt":"2022-10-20T00:14:18","slug":"solved-java-preincrement-and-postincrement-operators","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-java-preincrement-and-postincrement-operators\/","title":{"rendered":"[Solved] Java preincrement and postincrement operators"},"content":{"rendered":"

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Part one should print i = 2<\/code>. This is because:<\/p>\n

public class Sample \n{\n    public static void main(String[] args) throws Exception \n    {\n        \/\/part 1\n        int i=1;\n        \/\/ i++ means i is returned (which is i = 1), then incremented, \n        \/\/  therefore i = 1 because i is incremented to 2, but then reset \n        \/\/  to 1 (i's initial value)\n        i=i++;\n        \/\/ i is incremented, then returned, therefore i = 2\n        i=++i;\n        \/\/ again, first i is returned, then incremented, therefore i = 2 \n        \/\/  (see first statement)\n        i=i++;\n        System.out.println(i);\n\n        \/\/part 2\n        i=1;\n        \/\/ first i is returned then incremented, so i = 2, a = 1\n        int a=i++;\n        \/\/ i is incremented then returned, so i = 3 and a = 3\n        a=++i;\n        \/\/ i is first returned, then incremented, so a = 3 and i = 4\n        a=i++;\n        System.out.println(a+\"\\n\"+i);\n    }\n}\n<\/code><\/pre>\n
Perhaps the simplest way to understand this is to introduce some extra variables.  Here is what you have:<\/p>\n
\/\/ i = i++\ntemp = i;\ni = i + 1;\ni = temp; \/\/ so i equals the initial value of i (not the incremented value)\n\n\/\/ i = ++i;\ni = i + 1;\ntemp = i;\ni = temp; \/\/ which is i + 1\n\n\/\/ i = i++\ntemp = i;\ni = i + 1;\ni = temp; \/\/ so i equals the previous value of i (not i + 1)\n<\/code><\/pre>\n
Notice the difference in order of when the temp<\/code> variable is set–either before<\/em> or after<\/em> the increment depending on whether or not it’s a post-increment (i++<\/code>) or a pre-increment (++i<\/code>).<\/p>\n<\/p><\/div>\n
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            1<\/span> <\/p><\/div>\n<\/div>\n
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solved Java preincrement and postincrement operators <\/p>\n","protected":false},"excerpt":{"rendered":"
[ad_1] Part one should print i = 2. This is because: public class Sample { public static void main(String[] args) throws Exception { \/\/part 1 int i=1; \/\/ i++ means i is returned (which is i = 1), then incremented, \/\/ therefore i = 1 because i is incremented to 2, but then reset \/\/ … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[900,323],"class_list":["post-16567","post","type-post","status-publish","format-standard","hentry","category-solved","tag-increment","tag-java"],"yoast_head":"\n[Solved] Java preincrement and postincrement operators - JassWeb<\/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:\/\/jassweb.com\/solved\/solved-java-preincrement-and-postincrement-operators\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Java preincrement and postincrement operators - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Part one should print i = 2. This is because: public class Sample { public static void main(String[] args) throws Exception { \/\/part 1 int i=1; \/\/ i++ means i is returned (which is i = 1), then incremented, \/\/ therefore i = 1 because i is incremented to 2, but then reset \/\/ ... 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