JavaScript program to find Area and Perimeter of Rectangle
Last Updated :
27 Dec, 2022
A rectangle is a flat figure in a plane. It has four sides and four equal angles of 90 degrees each. In a rectangle all four sides are not of equal length like a square, sides opposite to each other have equal length. Both diagonals of the rectangle have equal lengths.
Examples:
Input: 4 5
Output: Area = 20
Perimeter = 18
Input: 2 3
Output: Area = 6
Perimeter = 10
Formulae:
Area of rectangle: a*b
Perimeter of rectangle: 2*(a + b)
Example: Below is the example that will illustrate the above formula:
Javascript
<script>
function areaRectangle(a, b) {
let area = a * b;
return area;
}
function perimeterRectangle(a, b) {
let perimeter = 2 * (a + b);
return perimeter;
}
let a = 5;
let b = 6;
console.log( "Area = " + areaRectangle(a, b));
console.log( "Perimeter = " + perimeterRectangle(a, b));
</script>
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Output:
Area = 30
Perimeter = 22
Time Complexity: O(1) as it is performing constant operations
Auxiliary Space: O(1)
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