Program to calculate square of a number

C Program to calculate square of a number:

By Ahmad Irshad | Programming Exercises and Solutions > Calculate square of a number

Write a C program to calculate square of a given number. How to calculate and waht is the logic to find the square of a number is given below.

Required knowledge for this exercise is: 

Basic Input output, Data Type, Arithmetic operators 

Before writing any program you just imagine about output screen first. For example, what input to be given, and output to be displayed. Let's have a look at the below example: 

INPUT:

Enter any number = 5

OUTPUT:

Square of a given number is = 25

Logic to find square of a given number:

Step by step logic to find square of a given number.

1) Print a massage to the user like "Enter any number:" using printf();

2) Input a number a number using scanf(); and store it in a variable num.

3) Now calculate square using farmulla square = num * num;

4) At last print the value of square. that's it!

Similarly you can calculate the cube of any given number by using farmula 

cube = num * num* num;

Program to calculate square of a number: 

1. /* C program to calculate square of a given number */ #include <stdio.h> int main() { int num, square; /* * Input a number from user */
2. printf("Enter any number: "); scanf("%d", &num); /* * Calculate square of a given number */ square = num * num;
3. /* * Print result of sqaur */ printf("Square of a given number %d is = %d\n", num, square); return 0; }

Output:

1. Enter any  number = 5
2. Square of a given number  5 is = 25

you can also write the above program by using pow() function. suppose you want to calculate power of a given number for example, 5 raised to the power 2. like (5²) = 5 * 5 = 25. Similarly 2 raised to the power 4. like 2^4 = 2 * 2 * 2 * 2 = 16. Now let's have a look at the below exmaple how to write program to find power of a number using pow() function.

Visit to know more about function

Program to calculate power of a given number using pow() function:

1. /* C program to calculate power of a given number using pow(); */ #include <stdio.h> #include <math.h> int main() { int base, power, result;
2. 
   
3. /* * Input base and power from user for example: 5 raised to the power 2
4. * (i.e 5²) here, 5 is called base, and 2 is called power.
5. */
6. printf("Enter base: "); scanf("%d", &base)
7.        printf("Enter power: ");
8. scanf("%d", &power);
9. /* Calculate the power of a given base number using pow();*/ result = pow(base, power);
11. /* Print the result */  printf("%d raised to the power %d is = %d", base, power, result); return 0; }

Output:

1. Enter base : 5
2. Enter power : 2
3. 5 raised to the power 2  = 25
4. 
   
5. Enter base = 2
6. Enter power = 4

1. 2 raised to the power 4 = 16

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