Trimming the Last Character from a String in JavaScript

You have a string, "12345.00," and you want it to return "12345.0." While trim would remove whitespace, you can consider the substring function for this task.

Solution Using substring

The substring function allows you to extract a substring from a specified start and end index. To eliminate the last character, you can specify the start index as 0 and the end index as the original string's length minus 1. Here's an example:

let str = "12345.00";
str = str.substring(0, str.length - 1);
console.log(str); // Output: 12345.0

This code creates a new string by extracting characters from index 0 (the beginning) to the index before the last character (length - 1). It effectively chops off the last character and assigns the resulting string back to the original variable.