C program to find area of a rectangle

Write a C program to input length and width of a rectangle and find area of the given rectangle. How to calculate area of a rectangle in C programming. Logic to find area of a rectangle whose length and width are given in C programming.


Enter length: 5
Enter width: 10


Area of rectangle = 50 sq. units

Required knowledge

Arithmetic operators, Data types, Basic input/output

Area of rectangle

Area of a rectangle is given by the formula -

Area of rectangle formula

Where l is length and w is width of the rectangle.

Logic to find area of rectangle

Below is the step by step descriptive logic to find area of rectangle -

  1. Input length and width of rectangle. Store it in two different variables say length and width.
  2. Apply formula to calculate rectangle area i.e. area = length * width.
  3. Finally, print the value of area.

Program to find area of rectangle

 * C program to find area of rectangle

#include <stdio.h>

int main()
    float length, width, area;

     * Input length and width of rectangle
    printf("Enter length of rectangle: ");
    scanf("%f", &length);
    printf("Enter width of rectangle: ");
    scanf("%d", &width);

    /* Calculate area of rectangle */
    area = length * width;

    /* Print area of rectangle */
    printf("Area of rectangle = %f sq. units ", area);

    return 0;


Enter length of rectangle: 5
Enter width of rectangle: 10
Area of rectangle = 50.000000 sq. units

Happy coding 😉

About Pankaj

Pankaj Prakash is the founder, editor and blogger at Codeforwin. He loves to learn new techs and write programming articles especially for beginners. He works at Vasudhaika Software Sols. as a Software Design Engineer and manages Codeforwin. In short Pankaj is Web developer, Blogger, Learner, Tech and Music lover.

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