# JavaScript : Pythagorean function in JavaScript

## JavaScript Math: Exercise-19 with Solution

Create a Pythagorean function in JavaScript.

*Note* : The Pythagorean Theorem tells us that the relationship in every right triangle is : c^{2} = a^{2} + b^{2}, where c is the hypotenuse and a, b are two legs of the triangle.

*Test Data*:

console.log(pythagorean_theorem(2, 4));

console.log(pythagorean_theorem(3, 4));

*Output * :

4.47213595499958

5

**Sample Solution:**

**JavaScript Code:**

```
// Define a function named pythagorean_theorem that calculates the hypotenuse of a right triangle given the lengths of its two legs.
function pythagorean_theorem(x, y) {
// Check if both x and y are of type number, if not, return false.
if ((typeof x !== 'number') || (typeof y !== 'number'))
return false;
// Calculate and return the square root of the sum of the squares of x and y (hypotenuse).
return Math.sqrt(x * x + y * y);
}
// Output the result of calculating the hypotenuse of a triangle with legs of lengths 2 and 4 to the console.
console.log(pythagorean_theorem(2, 4));
// Output the result of calculating the hypotenuse of a triangle with legs of lengths 3 and 4 to the console.
console.log(pythagorean_theorem(3, 4));
```

Output:

4.47213595499958 5

**Flowchart:**

**Live Demo: **

See the Pen javascript-math-exercise-19 by w3resource (@w3resource) on CodePen.

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