How can I use modulo operator (%) in calculation of numbers for JavaScript projects? More on stackoverflow.com

A quick peek at the documentation would reveal that % in JavaScript is not modulo, it's the remainder operator (or can be found in the ECMAScript specification ). This is confusing to many people, and unfortunately articles like these don't help by using the wrong terminology. The difference occurs when one of the values is negative. -21 % 4 The result of this is 3 for "mod" and -1 for "rem". This can be confusing behavior, if for example, to implement an isOdd function, you might think of something like this: function isOdd(n) { return n % 2 === 1 } However, this is wrong! It returns false for an input of -1. More on reddit.com

I hope you like the summary below: The post explains the Modulo operator (%) in JavaScript, which is often misunderstood and appears to produce random values. The author clarifies its function by redefining how we think about division, emphasizing that it's about dividing a number into equally-sized groups without fractional remainders. The remainder is what the modulo operator calculates. A practical use case provided is in creating circular arrays, like cycling through a list of colors indefinitely with time. This is achieved by using the modulo operator to cycle through array indices, demonstrating its utility in everyday coding. If you don't like the summary, just downvote and I'll try to delete the comment eventually 👍 More on reddit.com

Here's an AI-generated TL;DR to help you with the decision to read the post or not: The post explains the Modulo operator (%) in JavaScript, which is often misunderstood and appears to produce random values. The author clarifies its function by redefining how we think about division, emphasizing that it's about dividing a number into equally-sized groups without fractional remainders. The remainder is what the modulo operator calculates. A practical use case provided is in creating circular arrays, like cycling through a list of colors indefinitely with time. This is achieved by using the modulo operator to cycle through array indices, demonstrating its utility in everyday coding. Reply to this comment with feedback on how the summary can be improved. Downvote to delete this comment. More on reddit.com