Write a Java program to input length and width of a rectangle and calculate perimeter of the rectangle. How to find perimeter of a rectangle in Java programming. Logic to find the perimeter of a rectangle if length and width are given in Java programming.
Required knowledge
Operators, Data types, Defining Variables, Basic input/output
Perimeter of rectangle
Perimeter of rectangle is given by the below formula
2(l+w)
Where l is length and w is the width of rectangle.
Logic to find perimeter of a rectangle
Below is the step by step descriptive logic to find perimeter of a rectangle
Input length and width of the rectangle using scanf() function. Store it in two variables say length and width.
Calculate perimeter using formula for perimeter of rectangle perimeter = 2 * (length + width).
Print the value of perimeter.
Program to find perimeter of rectangle
/** * Java program to find perimeter of rectangle */ import java.util.Scanner; class Test { public static void main(String args[]) { float length, width, perimeter; Scanner op=new Scanner(System.in); /* * Input length and width of rectangle from user */ System.out.print("Enter length of the rectangle: "); length=op.nextFloat(); System.out.print("Enter width of the rectangle: "); width=op.nextFloat(); /* Calculate perimeter of rectangle */ perimeter = 2 * (length + width); /* Print perimeter of rectangle */ System.out.println("Perimeter of rectangle ="+perimeter+" units "); } }
Output:
Enter length of the rectangle: 5 Enter width of the rectangle: 3 Perimeter of rectangle =16.0 units
Note: Never forget to prioritize the order of operations using a pair of braces ( ). Since, statements perimeter = 2 * length + width and perimeter = 2 * (length + width) will generate different results.