👉 In programming, concatenation is a method of combining two or more strings together in order to create a new string. It's used when you want to combine multiple elements into one single object. For example, if you have an array containing two strings, you can concatenate them using the `+` operator: ```javascript let arr = ['apple', 'banana']; let combinedArray = arr.join(' '); console.log(combinedArray); // Output: "apple banana" ``` In JavaScript,