{"id":221054,"date":"2025-05-29T06:39:13","date_gmt":"2025-05-29T06:39:13","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=221054"},"modified":"2025-05-29T06:39:15","modified_gmt":"2025-05-29T06:39:15","slug":"exact-change","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/29\/exact-change\/","title":{"rendered":"Exact Change"},"content":{"rendered":"\n

B: Exact Change – Functions Define A Function Called Exact_change That Takes The Total Change Amount In Cents And Calculates The Change Using The Fewest Coins. The Coin Types Are Pennies, Nickels, Dimes, And Quarters. Then Write A Main Program That Reads The Total Change Amount As An Integer Input, Calls Exact_change(), And Outputs The Change, One<\/p>\n\n\n\n

The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

:<\/p>\n\n\n\n

\n\n\n\n

\u2705 Correct Python Code:<\/h3>\n\n\n\n
def exact_change(total_cents):\n    quarters = total_cents \/\/ 25\n    total_cents %= 25\n\n    dimes = total_cents \/\/ 10\n    total_cents %= 10\n\n    nickels = total_cents \/\/ 5\n    total_cents %= 5\n\n    pennies = total_cents\n\n    return quarters, dimes, nickels, pennies\n\ndef main():\n    total_cents = int(input())\n\n    if total_cents == 0:\n        print(\"no change\")\n    else:\n        quarters, dimes, nickels, pennies = exact_change(total_cents)\n\n        if quarters > 0:\n            print(f\"{quarters} quarter{'s' if quarters > 1 else ''}\")\n        if dimes > 0:\n            print(f\"{dimes} dime{'s' if dimes > 1 else ''}\")\n        if nickels > 0:\n            print(f\"{nickels} nickel{'s' if nickels > 1 else ''}\")\n        if pennies > 0:\n            print(f\"{pennies} penn{'ies' if pennies > 1 else 'y'}\")\n\nmain()\n<\/code><\/pre>\n\n\n\n
\n\n\n\n
\ud83d\udcdd Explanation<\/h3>\n\n\n\n
The goal of this program is to convert a total amount of cents (less than a dollar) into the fewest number of coins using only quarters (25\u00a2), dimes (10\u00a2), nickels (5\u00a2), and pennies (1\u00a2). This is a classic greedy algorithm problem, where at each step, we try to use the largest denomination possible to reduce the total amount efficiently.<\/p>\n\n\n\n
The exact_change()<\/code> function takes an integer input total_cents<\/code> and calculates how many of each coin is needed:<\/p>\n\n\n\n
    \n
  1. Quarters<\/strong>: It divides the total amount by 25 to find how many quarters can be used. The remainder is then updated using the modulus operator (%<\/code>).<\/li>\n\n\n\n
  2. Dimes<\/strong>: It repeats the same logic using 10.<\/li>\n\n\n\n
  3. Nickels<\/strong>: Then for 5.<\/li>\n\n\n\n
  4. Pennies<\/strong>: Whatever is left after dividing by 5 becomes the number of pennies.<\/li>\n<\/ol>\n\n\n\n
    The function returns a tuple with counts for each coin.<\/p>\n\n\n\n
    In the main()<\/code> function, the program reads user input and checks if the value is zero. If so, it prints “no change.” Otherwise, it calls exact_change()<\/code> and prints the results. It uses conditionals to skip zero values and handles proper pluralization, like “1 penny” vs. “2 pennies”.<\/p>\n\n\n\n
    This approach ensures minimal coin use by always selecting the highest-value coin possible at each step, which is optimal for U.S. coin denominations.<\/p>\n\n\n\n
    \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"
    B: Exact Change – Functions Define A Function Called Exact_change That Takes The Total Change Amount In Cents And Calculates The Change Using The Fewest Coins. The Coin Types Are Pennies, Nickels, Dimes, And Quarters. Then Write A Main Program That Reads The Total Change Amount As An Integer Input, Calls Exact_change(), And Outputs The […]<\/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-221054","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/221054","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=221054"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/221054\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=221054"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=221054"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=221054"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}