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Understanding Closures in JavaScript: A Comprehensive Guide 

function createCounter() {
    let count = 0;

    return {
        increment: function() {
            count++;
            return count;
        },
        decrement: function() {
            count--;
            return count;
        },
        getValue: function() {
            return count;
        }
    };
}

const counterObj = createCounter();
console.log(counterObj.increment());  // Output: 1
console.log(counterObj.increment());  // Output: 2
console.log(counterObj.decrement());  // Output: 1
console.log(counterObj.getValue());   // Output: 1

In this example, the createCounter function creates a closure that keeps track of the count variable. The returned object allows you to increment, decrement, and get the current value of count without exposing the variable directly.

Aug 30, 2024
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