Commutative Operation

In math, an operation is commutative if the order of the numbers used can be altered with the result remaining the same. For example, addition and multiplication are commutative operations, as shown below.

2+3 = 5
3+2 = 5
2*3 = 6
3*2 = 6

In contrast, subtraction and division are not commutative, because changing the order of the numbers involved changes the result of the calculation, as shown below.

2-7 = -5
7-2 = 5
3/4 = 0.75
4/3 = 1.3333333

In programming, this can be used with the logical AND or the logical OR operations to "short circuit" if a particular condition is met, so other possibilities are not tested. For example, with the AND operation, if the first condition is false, then the whole comparison must return false, so the remaining conditions are not evaluated. For example, a null value in JavaScript would create an error if it is used. A logical statement could be used to indicate if a value is null, then the remainder of the statement is not executed.

var x = 0;
if ( (y !== null) && (y > 0) && (y < 3) ) {
window.alert(y * 4);
}

In this case, if y is null, then the remainder of the statement is not executed. That prevents any errors with a null y variable and keeps additional processing from being done if y is null.

What is an Operating System? » Computer Shortcut Keys and their Functions » Keyboard Function Keys » Computer Basics - Hardware - Software - Parts

Short Stories for Kids - Moral Stories – English Short Stories for Children - Moral Stories for Kids -

Stories for Kids - Funny Story for Kids - Scary Stories for Kids - Really Funny Short Stories - Bedtime Stories
Proverb Stories
Powerful Motivational Quotes for Students » Success Quotes » English Short Stories for Kids

Cabin Crew Jobs & Career Advice » Secretary Job Description » Receptionist Job Description » Top 100 Interview Questions and Answers » How to Prepare for an Interview » How to Write a CV » How to Choose a Career » Computer Shortcut Keys and their Functions

Click here to post comments

Join in and write your own page! It's easy to do. How? Simply click here to return to Computer Basics FAQ.

Army Jobs - Navy Jobs - Military Jobs

Scholarship 2024/25

Current Scholarships 2024/2025 - Fully Funded

Full Undergraduate Scholarships 2024/2025

Fully Funded Masters Scholarships 2024/25

PhD Scholarships for International Students - Fully Funded!

Funding Opportunities for Journalists 2024/2025

Funding for NGOs 2024/2025

Funding for Artists 2024/2025

Funding for Entrepreneurs 2024/2025

✅Over 4500 Current Fully Funded Scholarships for International Students

✅ Undergraduate Scholarships 2024

✅ Masters Scholarships 2024

✅ PhD Scholarships 2024 Click Here!

Free Scholarship Newsletter --- E-mail Address

First Name

Then Don't worry — your e-mail address is totally secure. I promise to use it only to send you Advance Africa Newsletter.