Program to find area of a rectangle in C

C Program to find area of a rectangle:

By Ahmad Irshad | Programming Exercises and Solutions > find area of a rectangle

Write a C program to find area of a rectangle by taking input length and width from user. Let's see the logic to find area of rectangle whose length and width are already given.

Required knowledge for this exercise is: 

Basic Input output, Data Type, Arithmetic operators 

Before writing any program you just imagine about output screen first. For example: what input to be given, and output to be displayed. Let's have a look at the below example: 

INPUT:

Enter length of a rectangle: 4

Enter width of a rectangle: 15

OUTPUT:

Area of a rectangle = 60.00 sq. units

Logic to find area of a rectangle:

1) Print a massage to the user like "Enter length and width of a rectangle:"  using printf();

2) Input length and width using scanf(); and store it in two different variables length and width.

3) Now calculate area of a rectangle using farmula: Area = length * width

4) At last print the result of area of a rectangle. that's it!

Program to find area of a rectangle: 

1. /* C program to find area of a rectangle */
   
2. #include <stdio.h> int main() { float length, width, area; /* * Input length and width of a rectangle */ printf("Enter length of a rectangle: "); scanf("%f", &length); printf("Enter width of a rectangle: "); scanf("%f", &width); /* farmula to Calculate area of rectangle */ area = length * width; /* Print area of rectangle */ printf("Area of rectangle = %.2f sq. units ", area); return 0;

Output:

1. Enter length of a rectangle: 4

1. Enter width of a rectagle: 15
2. Area of rectangle = 60.00 sq. units

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