freeCodeCamp/guide/english/certifications/javascript-algorithms-and-data-structures/functional-programming/introduction-to-currying-and-partial-application/index.md

---
title: Introduction to Currying and Partial Application
---
## Introduction to Currying and Partial Application

### Solution

```javascript

function add(x) {
  // Add your code below this line
  return function(y) {
    return function(z) {
      return x + y + z;
    }
  }
  // Add your code above this line
}
add(10)(20)(30);

```