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Calculate Square Area

Published at19 Apr 2026
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Calculations & Math Easy 13 views
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Given the side length of a square, calculate its area using the formula A = side × side. The result is an integer for integer inputs.

For example, a square with side length 5 has area 25. Side length 10 has area 100. Side length 0 has area 0. Side length 1 has area 1.

The area of a square is one of the simplest geometric formulas and is foundational for understanding area calculations for rectangles, parallelograms, and more complex shapes. The formula A = s² is used in construction (floor tiling), graphics (pixel area), and design (layout dimensions).

The solution multiplies the side length by itself. This can be written as side * side or side ** 2 (using the exponentiation operator). The result is the same regardless of which method is used.

Edge cases include side length 0 (return 0), side length 1 (return 1), and very large side lengths where the square might overflow integer range.

Learn about our pseudocode specification
Guide

Example Input & Output

Example 1
Input
side = 4
Output
16
Explanation

4 * 4 = 16.

Example 2
Input
side = 7
Output
49
Explanation

7 * 7 = 49.

Example 3
Input
side = 0
Output
0
Explanation

0 * 0 = 0.

Algorithm Flow

Recommendation Algorithm Flow for Calculate Square Area
Recommendation Algorithm Flow for Calculate Square Area

Solution Approach

Multiply the side length by itself to compute the area using the geometric formula A = s².

function squareArea(side)
  return side * side

Return the product of side multiplied by itself. This directly implements the area formula for a square, where the area equals the length of one side squared. The multiplication operator (*) handles both integer inputs (producing integer results) and floating-point inputs naturally.

Time complexity is O(1) since multiplication is a constant-time CPU operation. Space complexity is O(1).

Best Answers

Pseudocode - Approach 1
program calculate_square_area
dictionary
   side, area: integer
algorithm
   input(side)
   area <- side * side
   output(area)
endprogram