- C Programming Examples
- C Programming Examples
- C Print Hello World
- C Get Input from User
- C Print Integer
- C Add Two Numbers
- C Add Subtract Multiply Divide
- C Add n Numbers
- C Area Perimeter of Square
- C Area Perimeter of Rectangle
- C Area Circum of Circle
- C Fahrenheit to Celsius
- C Celsius to Fahrenheit
- C Inches to Centimeters
- C Kilogram to Gram
- C Reverse a Number
- C Swap Two Numbers
- C Interchange Numbers
- C Print ASCII Value
- C Print Fibonacci Series
- C Check Palindrome or Not
- C Check Armstrong or Not
- C Find Armstrong Numbers
- C Find nCr and nPr
- C Find Profit Loss
- C Sum of their Square
- C First & Last Digit Sum
- C Sum of All Digit
- C Product of All Digit
- C Print Total Digit in Number
- C Check Perfect Number
- C Find Basic Gross Salary
- C Round Number to Integer
- C Print Series upto n Term
- C Find Factors of Number
- C if-else & Loop Programs
- C Check Even or Odd
- C Check Prime or Not
- C Check Alphabet or Not
- C Check Vowel or Not
- C Check Leap Year or Not
- C Is Reverse Equal Original
- C Make Calculator
- C Add Digits of Number
- Count Positive Negative Zero
- C Largest of Two Numbers
- C Largest of Three Numbers
- C Smallest of Two Numbers
- C Smallest of Three Numbers
- C Find Factorial of Number
- C Find LCM & HCF
- C Find LCM of n Numbers
- C Find HCF of n Numbers
- C Find Arithmetic Mean
- C Find Average, Percentage
- C Find Student Grade
- C Print Table of Number
- C Print Prime Numbers
- C Find Discount Purchase
- C Calculate Parcel Charge
- C Calculate Wage of Labor
- C Print Phone Bill
- C Conversion programs
- C Decimal to Binary
- C Decimal to Octal
- C Decimal to Hexadecimal
- C Binary to Decimal
- C Binary to Octal
- C Binary to Hexadecimal
- C Octal to Decimal
- C Octal to Binary
- C Octal to Hexadecimal
- C Hexadecimal to Decimal
- C Hexadecimal to Binary
- C Hexadecimal to Octal
- C Pattern Programs
- C Pattern Printing Programs
- C Print Diamond Pattern
- C Print Floyd's Triangle
- C Print Pascal's Triangle
- C Array Programs
- C 1D Array Programs
- C Linear Search
- C Binary Search
- C Largest Element in Array
- C Smallest Element in Array
- C Second Largest/Smallest
- C Count Even Odd
- C Array Element at Even
- C Array Element at Odd
- C Print Even Array Elements
- C Print Odd Array Elements
- C Sum/Product of Even/Odd
- C Reverse an Array
- C Insert Element in Array
- C Delete Element from Array
- C Merge Two Arrays
- C Bubble Sort
- C Selection Sort
- C Insertion Sort
- C Print Common Elements
- C 2D Array Programs
- C Add Two Matrices
- C Subtract Two Matrices
- C Transpose a Matrix
- C Multiply Two Matrices
- C Sum All Matrix Elements
- C Largest Element in Matrix
- C Print Row Column Total
- C 3D Array Programs
- C String Programs
- C Print String
- C Find Length of String
- C Compare Two String
- C Copy a String
- C Concatenate String
- C Reverse a String
- C Count Vowels Consonants
- C Replace Vowel in String
- C Delete Vowels from String
- C Delete Word from String
- C Frequency of Character
- C Count Word in String
- C Remove Spaces from String
- C Sort a String
- C Sort String in Alphabetical
- C Sort Words in Ascending
- C Sort Words in Descending
- C Uppercase to Lowercase
- C Lowercase to Uppercase
- C Swap Two Strings
- C Check Anagram or Not
- C Check Palindrome String
- C Print Number in Words
- C Print Successive Character
- C Character without Space
- C Remove Extra Spaces
- C File Programs
- C Read a File
- C Write Content to File
- C Read & Display File
- C Copy a File
- C Merge Two Files
- C Reverse File
- C Count All Character in File
- C List Files in Directory
- C Encrypt & Decrypt a File
- C Delete a File
- C Misc Programs
- Generate Random Numbers
- C Print Date Time
- C Print Message with Time
- C Get IP Address
- C Print Smiling face
- C Pass Array to Function
- Add Two Numbers using Pointer
- C Address of Variable
- C Shutdown Computer
- C Programming Tutorial
- C Tutorial
- C Programming Library
- C Standard Library
- C Programming Test
- C Programming Test
- Give Online Test
- All Test List

# C Program to Calculate Area and Perimeter of Square

In this article, you will learn and get code about the program given below:

- Find Area of Square
- Find Area of Square using Function
- Find Perimeter of Square
- Find Perimeter of Square using Function

## How to Find Area of Square ?

To find area of square, use the simple formula, **area = len*len** or **area = len ^{2}**. Here

**len**indicates side length of square. As we all knows that all the four side of square is of equal length. Now let's go through the program given below.

## Area of Square Program in C

To calculate area of square in C programming, you have to ask from user to enter the side length of square and then perform the simple operation of multiplication of given number with itself (length of square) as shown here in the following program:

#include<stdio.h> #include<conio.h> int main() { float len, area; printf("Enter length of Square: "); scanf("%f", &len); area = len*len; printf("\nArea = %0.2f", area); getch(); return 0; }

Here is the sample run of above program. This is the snapshot of initial output:

Enter the length of square say **2.5** and press **ENTER** key to see the area as shown in the snapshot of final output given below:

#### Steps used in above Program

Here are the list of some main steps used in above program:

- Declare any two variables of floating-point type. Because side length of square may contain decimal value
- Receive length of square in
**len**variable - Perform multiplication operation of given value to
**len**variable with itself and initialize it to**area**variable - Now just print the value of
**area**as output - The variable
**area**indicates area of square on output screen - Here
**%0.2f**is used to print value of**area**upto 2 decimal places only

## Area of Square in C using Function

Now let's create another program that does the same job as of previous program. Except this program is created using function. Let's take a look at it:

#include<stdio.h> #include<conio.h> float findAreaSquare(float); int main() { float len, area; printf("Enter length of Square: "); scanf("%f", &len); area = findAreaSquare(len); printf("\nArea = %0.2f", area); getch(); return 0; } float findAreaSquare(float leng) { return leng*leng; }

This program produces same output as of previous program.

## How to Find Perimeter of Square ?

To find perimeter of square, use the formula **perimeter = 4*side**. Here **side** indicates side length of square.
To calculate perimeter, we have to find the boundary length of square. As square has 4 side of equal length, so here we only
have to ask for side length, and then just multiply it with 4. That will be perimeter.

## Perimeter of Square Program in C

Here is the program in C that calculates perimeter of square of given length (by user at run-time).

#include<stdio.h> #include<conio.h> int main() { float len, perimeter; printf("Enter length of Square: "); scanf("%f", &len); perimeter = 4*len; printf("\nPerimeter = %0.2f", perimeter); getch(); return 0; }

When the above c program is compile and executed, it will produce the following result:

You can clearly understand this program with yourself, nothing extra is included here. So I'm going to next program, that is to calculate perimeter of square using function.

## Perimeter of Square in C using Function

This is the final program of this article, that does the same job as of previous program, that is, will ask from user to enter side length of square and will calculate perimeter of square but this time using function. Let's have a look at it:

#include<stdio.h> #include<conio.h> float findPeriSquare(float); int main() { float len, perimeter; printf("Enter length of Square: "); scanf("%f", &len); perimeter = findPeriSquare(len); printf("\nPerimeter = %0.2f", perimeter); getch(); return 0; } float findPeriSquare(float len) { return 4*len; }

This program produces the same output as of previous program produced. To learn more about function, refer to Function in C tutorial.

« Previous Program Next Program »