Sum of digits of a number in c

Posted by: saidesh Posted date: June 18, 2021 / comment : 0 ,

  • To find sum of digits of a number in c , we need to get individual numbers and add those numbers.
  • First of all read a number from user using scanf.
  • Using while loop get individual number 
  • Divide the number with 10 so we will get last digit of that number as remainder , once we get that last digit then add it to one variable and divide that number with 10 so it will become one digit less.
  • like this we can get all digits and add all those numbers to get sum of digits 
  • Sum of individual digits in c program
  • c program to find sum of digits of a 3 digit number
sum of digits in c

correction: here n =number .

# program to find sum of digits of a number in c

  1. #include<stdio.h> // include stdio.h
  2. //c program to find sum of digits of a number using while loop
  3. //write a program to find sum of digits of a number
  4. //www.instanceofjava.com
  5. int main()
  6. {
  7.     // declare variables 
  8.     int number, remainder, sum = 0;
  9.     //read input from user 
  10.     printf("Enter a number: ");
  11.     scanf("%d", &number);

  13.    //iterate until number not equal to zero
  14.    // get individual digits and add all those digits to get sum
  15.     while(number != 0)
  16.     {
  17.         remainder = number % 10;
  18.         sum += remainder;
  19.         number = number / 10;
  20.     }
  21.   //print sum of digits in c
  22.     printf("sum = %d", sum);

  24.     getch();
  25. }


Output:
  1. Enter a number
  2. 123
  3. sum = 6


C Program to find sum of two numbers

Posted by: saidesh Posted date: June 17, 2021 / comment : 0 ,

 Lets discuss a basic c program

  • Sum of two integers using c. This might be the first practice program for all users.
  • To check sum of two integers , read input from user and store in two corresponding integer variables.
  • Also take one more variable to store result of sum of two numbers
  • c= a+b
  • Print result using printf

sum of two numbers in c


  2. #include <stdio.h>
  3. // program to check sum of two numbers in c
  4. // write a c program to find sum of two integers
  5. // www.instanceofjava.com
  6. int main()
  7. {
  8.     int x, y, sum;
  9.     // read input from user
  10.     printf(" Please enter any two numbers: ");
  11.     scanf("%d %d", &x, &y);
  12.     // sum of two numbers
  13.     sum=x+y;
  14.     
  15.     printf("Sum of %d and %d is %d", x, y, sum);

  17.     getch();
  18. }
Output:

  1. Please enter any two numbers
  2. 10
  3. 20
  4. Sum of 10 and 20 is 30

Gcd of two numbers in c

Posted by: saidesh Posted date: June 17, 2021 / comment : 0 ,

  • To check GCD of two numbers first we need to read input from user. i.e ask user to enter two numbers
  • Store those two numbers in two integer variables
  • Check if number is factor of given two numbers by iterating in for loop.

gcd of two numbers in c


  2. #include <stdio.h>
  3. // program to check gcd of two numbers in c 
  4. // write a c program to find gcd of two integers
  5. // www.instanceofjava.com
  6. int main()
  7. {
  8.     int number1, number2, i, gcd;
  9.     // read input from user
  10.     printf(" please enter any two numbers: ");
  11.     scanf("%d %d", &number1, &number2);

  13.     for(i=1; i <= number1 && i <= number2; ++i)
  14.     {
  15.         // checking  if i is divisible by both numbers / factor of both numbers
  16.         if(number1%i==0 && number2%i==0)
  17.             gcd = i;
  18.     }

  20.     printf("GCD of %d and %d is %d", number1, number2, gcd);

  22.     getch();
  23. }


Output:

gcd of two integers in c




  3. #include <stdio.h>
  4. // Function to compute Greatest Common Divisor using Euclidean Algorithm
  5. int gcd(int a, int b) {
  6.     while (b != 0) {
  7.         int temp = b;
  8.         b = a % b;
  9.         a = temp;
  10.     }
  11.     return a;
  12. }

  14. int main() {
  15.     int num1, num2;

  17.     // enter  two numbers from the user
  18.     printf("Enter two numbers to find their GCD: ");
  19.     scanf("%d %d", &num1, &num2);

  21.     // Ensure numbers are positive
  22.     if (num1 < 0) num1 = -num1;
  23.     if (num2 < 0) num2 = -num2;

  25.     // Calculate and display the GCD
  26.     int result = gcd(num1, num2);
  27.     printf("The GCD of %d and %d is: %d\n", num1, num2, result);

  29.     return 0;
  30. }


Explanation:

  1. Input:
    • The user enters two numbers.
  2. Logic:
    • The findGCD function uses the Euclidean algorithm:
      • Replace aa with bb and bb with a%ba \% b until b=0b = 0.
      • The final value of aa is the GCD.
  3. Output:
    • The program prints the GCD of the two input numbers.



C program to check whether the triangle is right angled triangle

Posted by: saidesh Posted date: June 16, 2021 / comment : 1 ,

 c program to check whether the triangle is right angled triangle

  • To check right angle triangle or not first we need to check sum of all three angles 
  • If sum of all three angles is 180 then we it should satisfy second condition also
  • Second condition is on of the angle should be 90.
  • if both the conditions are passed then we can say it is a right angle triangle.
  • Now lets write a c program to check triangle is right angle triangle or not.
right angle triangle in c


  1. #include<stdio.h>
  2. // write a c program too check traingle is right angle triasngle or not
  3. //www.instanceofjava.com
  4. int main()
  5. {
  6.      int angle1,angle2,angle3;
  7.      printf("Enter Three Angles of Triangle");
  8.      printf("\n-------------------------------\n");
  9.      printf("Enter Angle1  : ");
  10.      scanf("%d", &angle1);
  11.      printf("\nEnter  Angle2 : ");
  12.      scanf("%d",&angle2);
  13.      printf("\nEnter  Angle2  : ");
  14.      scanf("%d",&angle3);
  15.      printf("--------------------------------\n");
  16.      if(angle1+angle2+angle3==180) 
  17.      {
  18.          
  19.           if(angle1==90 || angle2==90 || angle3==90)
  20.           {
  21.                printf("\nTriangle is Right Angle Triangle\n"); //
  22.           }
  23.          
  24.      }
  25.      else
  26.      {
  27.           printf("\nIts Not a Triangle ");
  28.      }
  29.     getch();
  30. }


Write a c program to check a number is palindrome or not:

Posted by: saidesh Posted date: June 16, 2021 / comment : 0 ,


check palindrome number in c

  • If reverse number of a number is same then we can say its a palindrome number
  • we already know logic to reverse a number using remainder logic
  • read input from the user and store it in a variable
  • check reverse number of given number 
  • compare original number and reverse number if both are same then we can say it's a palindrome number 
  • C Program to Check Whether a Number is Palindrome or Not


Write a c program to check a number is palindrome or not:

  1. #include <stdio.h>
  2. int main() {
  3.     int n, revnumber = 0, ramindernum, number;
  4.     printf("Enter number: ");
  5.     scanf("%d", &n);
  6.     number = n;

  8.     // reversed integer is stored in reversedN
  9.     while (n != 0) {
  10.         ramindernum = n % 10;
  11.         revnumber = revnumber * 10 + ramindernum;
  12.         n /= 10;
  13.     }

  15.     //  if number  and revnumber are same then its a palindrome
  16.     if (number == revnumber)
  17.         printf("%d is a palindrome.", number);
  18.     else
  19.         printf("%d is not a palindrome.", number);

  21.     getch();
  22. }


Output:

palindrome in c



C program to print pyramid pattern of numbers

Posted by: saidesh Posted date: June 15, 2021 / comment : 0 ,

 #1: C program to print pyramid pattern of n stars

  1. #include <stdio.h>
  2. //c program to print pyramid pattern of numbers
  3. // www.instanceofjava.com
  4. int main(){
  5.    int number,k,m;

  7.     printf("Number of lines of star pattern  ");
  8.     scanf("%d", &number);

  10.     printf("\n");

  12.     for(  k = 1; k <= number; k++ )
  13.     {
  14.         for( m = 1; m <= k; m++)
  15.         {
  16.             printf("*");
  17.         }
  18.         printf("\n");
  19.     }

  21.    getch();
  22. }

Output:
pattern program in c language



#2: C program to print pyramid pattern of n Numbers

  1. #include <stdio.h>
  2. //c program to print pyramid pattern of numbers
  3. // www.instanceofjava.com
  4. //pyramid pattern in c
  5. //write a c
  6.  program to print following pattern
  7. int main(){
  8.    int number,k,m;

  10.     printf("Number of lines of star pattern  ");
  11.     scanf("%d", &number);

  13.     printf("\n");

  15.     for(  k = 1; k <= number; k++ )
  16.     {
  17.         for( m = 1; m <= k; m++)
  18.         {
  19.            printf("%-5d ", m);
  20.         }
  21.         printf("\n");
  22.     }

  24.    getch();
  25. }

Output:

pyramid pattern in c


Subscribe to: Comments ( Atom )
Select Menu
Copyright © 2015-2025 instanceofjava.com , All rights reserved | Privacy policy | About Us