C program to find the hypotenuse of a right-angled triangle

Find the hypotenuse of a right-angled triangle:

hypot is a method defined in math.h header file in C and using this method, we can find the hypotenuse length of a right-angled triangle.

Hypotenuse is the longest side of a right-angled triangle. It is the square root of the sum of squares of other two sides.

For example, if a and b are the other two sides, hypotenuse will be square root of x^2+y^2.

hypot method takes two parameters, i.e. the adjacent and opposite side lengths. It returns the length of hypotenuse.

In this post, we will learn how to use hypot with examples.

Definition of hypot:

hypot is defined as like below:

float hypotf(float a, float b);
double hypot(double a, double b);
long double hypotl(long double a, long double b);

Here, a and b are the two sides of the triangle. It returns the size of the hypotenuse.

Example of hypot:

Let’s take a look at the below example:

#include <stdio.h>
#include <math.h>

int main()
    double aDouble = 4;
    double bDouble = 4;

    double doubleHypot = hypot(aDouble, bDouble);

    float aFloat = 4;
    float bFloat = 4;

    float floatHypot = hypot(aFloat, bFloat);


    return 0;

Here, I am showing how to use hypot with double and float values.

How to use with integer:

We can use this with integer, but you will not get accurate result. For example:

#include <stdio.h>
#include <math.h>

int main()
    int aInt = 4;
    int bInt = 4;

    int intHypot = hypot(aInt, bInt);


    return 0;

It will return 5.

You might also like: