Arithmetic Operations In A Programming Language
Overview
A vending machine has 287 cents to give back and a hopper of coins. It cannot hand over 2.87 of anything. It has to work out how many dollars, then how many fifties, then how many twenties, and it does that with two operations that a calculator does not have a button for: whole-number division, and the remainder that whole-number division leaves behind. Almost every time a program has to split a quantity into units, those two do the work.
This lesson covers the five arithmetic operations the specification names: addition, subtraction, multiplication, real division, and integer division including remainders. Four of them behave exactly as they do in mathematics. The fifth is the one that earns marks and solves problems, and the specification devotes its whole additional-information column to explaining it. You will learn what DIV and MOD produce, why the pair of them is usually used together, and the handful of standard tricks that MOD makes possible.
Objectives
- Be familiar with and be able to use:
- addition
- subtraction
- multiplication
- real division
- integer division, including remainders.
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Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Arithmetic Operations In A Programming Language. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- What is the value of 23 DIV 4? A. 3 B. 5 C. 5.75 D. 6 Answer: B
- What is the value of 23 MOD 4? A. 0 B. 1 C. 3 D. 5 Answer: C
- Which expression tests whether the integer N is a multiple of 3? A. N DIV 3 = 0 B. N MOD 3 = 0 C. N / 3 = 0 D. 3 MOD N = 0 Answer: B
- What is the value of 5 + 10 DIV 5? A. 3 B. 7 C. 11 D. 15 Answer: B
- A variable Turn holds 2 and is updated by Turn ← (Turn + 1) MOD 3. What does it hold afterwards? A. 0 B. 1 C. 2 D. 3 Answer: A
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