{"id":209750,"date":"2025-04-29T13:31:52","date_gmt":"2025-04-29T13:31:52","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=209750"},"modified":"2025-04-29T13:31:54","modified_gmt":"2025-04-29T13:31:54","slug":"write-a-method-called-dayorweek-that-accepts-an-integer-as-a-parameter-representing-what-day-of-the-year-it-is-out-of-365-with-1-being-the-first-day-of-the-year-and-365-being-the-last-for-example-14","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/04\/29\/write-a-method-called-dayorweek-that-accepts-an-integer-as-a-parameter-representing-what-day-of-the-year-it-is-out-of-365-with-1-being-the-first-day-of-the-year-and-365-being-the-last-for-example-14\/","title":{"rendered":"Write a method called dayorWeek that accepts an integer as a parameter representing what day of the year it is out of 365 with 1 being the first day of the year and 365 being the last (for example: 142)"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Write a method called dayorWeek that accepts an integer as a parameter representing what day of the year it is out of 365 with 1 being the first day of the year and 365 being the last (for example: 142). Your method should calculate and return what day of the week the given day falls on. You should use integers to represent the days of the week (0 being Sunday, 1 being Monday, 2 being Tuesday, 6 being Saturday). You should assume that the first day of the year is a Wednesday. Below are some example method calls and the value they would return:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">dayorWeek(5): 0<br>dayorWeek(63): 2<br>dayorWeek(247): 4<br>dayorWeek(316): 3<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0);color:#0693e3\" class=\"has-inline-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Here is the correct implementation of the <code>dayorWeek<\/code> method in Java:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class DayOfWeekCalculator {\n    public static int dayorWeek(int dayOfYear) {\n        \/\/ First day of the year is a Wednesday, which is 3\n        int startDay = 3;\n\n        \/\/ Subtract 1 because day 1 is already the starting day\n        int dayOfWeek = (startDay + (dayOfYear - 1)) % 7;\n\n        return dayOfWeek;\n    }\n\n    \/\/ Optional main method for testing\n    public static void main(String&#91;] args) {\n        System.out.println(dayorWeek(5));   \/\/ Output: 0 (Sunday)\n        System.out.println(dayorWeek(63));  \/\/ Output: 2 (Tuesday)\n        System.out.println(dayorWeek(247)); \/\/ Output: 4 (Thursday)\n        System.out.println(dayorWeek(316)); \/\/ Output: 3 (Wednesday)\n    }\n}<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 Explanation (300+ words):<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The method <code>dayorWeek<\/code> is designed to determine the day of the week corresponding to a given day of the year (1 through 365). The days of the week are represented numerically, where:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>0 \u2192 Sunday<\/li>\n\n\n\n<li>1 \u2192 Monday<\/li>\n\n\n\n<li>2 \u2192 Tuesday<\/li>\n\n\n\n<li>3 \u2192 Wednesday<\/li>\n\n\n\n<li>4 \u2192 Thursday<\/li>\n\n\n\n<li>5 \u2192 Friday<\/li>\n\n\n\n<li>6 \u2192 Saturday<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The critical point in this problem is that <strong>day 1<\/strong> of the year is a <strong>Wednesday<\/strong>, which corresponds to <strong>3<\/strong> in the day-of-week numbering.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To calculate what day of the week any given day falls on, you use <strong>modulo arithmetic<\/strong>. The idea is to count how many days have passed since day 1 and adjust the weekday accordingly. This is done using the formula:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>(startDay + (dayOfYear - 1)) % 7<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Why subtract 1?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If <code>dayOfYear<\/code> is 1, we are on the first day of the year, so <code>(dayOfYear - 1)<\/code> is 0. We do not want to move forward at all. That way, the result is simply the <code>startDay<\/code>, which is 3 (Wednesday). This ensures the calculation is accurate without overshooting by one day.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Example:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>dayorWeek(5)<\/strong><br>\u2192 Days passed since Jan 1: <code>5 - 1 = 4<\/code><br>\u2192 <code>(3 + 4) % 7 = 7 % 7 = 0<\/code><br>\u2192 Day of the week: <strong>0 (Sunday)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>dayorWeek(63)<\/strong><br>\u2192 <code>(3 + 62) % 7 = 65 % 7 = 2<\/code><br>\u2192 Day of the week: <strong>2 (Tuesday)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This method provides a simple and reliable way to compute weekdays from ordinal days using modular arithmetic, assuming the starting weekday is known.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Would you like this translated into Python or another language?<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Write a method called dayorWeek that accepts an integer as a parameter representing what day of the year it is out of 365 with 1 being the first day of the year and 365 being the last (for example: 142). Your method should calculate and return what day of the week the given day falls [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-209750","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/209750","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=209750"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/209750\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=209750"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=209750"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=209750"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}