# Basic C Exercises

**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.

#### Required knowledge

Data Types in c, Input/Output in C, C Operators#### 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 -

Input length and width of rectangle. Store it in two different variables say length and width.

Apply formula to calculate rectangle area i.e. area = length * width.

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; }

**Output:**

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