C Program to Find Volume of a Sphere

This program calculates the volume of a sphere using the formula (4/3) × π × r³. The value of π is defined as a constant in C.

Concept Overview

The volume of a sphere is calculated using simple mathematical formula: Volume = (4/3) × π × r³. In C, we can define π as a constant and perform these calculations easily.

Program

#include <stdio.h>

int main() {
    float radius, volume;
    const float PI = 3.1415926535;

    printf("Enter the radius of the sphere: ");
    scanf("%f", &radius);

    // Volume formula: (4/3) * PI * r^3
    volume = (4.0 / 3.0) * PI * radius * radius * radius;

    printf("Volume of the sphere with radius %.0f is %f\n", radius, volume);

    return 0;
}

Output

Volume of the sphere with radius 5 is 523.583333

Explanation

• `#define pi 3.1415` – Defines the constant value of π used in calculations.
• `int r = 5;` – Declares the radius of the sphere.
• `volume = (4.0/3.0) * pi * r * r * r;` – Calculates the volume using the formula (4/3)πr³.
• `printf()` – Displays the result on the screen.