This program checks whether a given number is a palindrome (reads the same forwards and backwards) using a while loop. C Program #include <stdio.h> int main() { int num, original, reversed = 0, remainder; printf(“Enter a number: “); scanf(“%d”, &num); original = num; while (num != 0) { remainder = num % 10; reversed = … Read more
This program determines a student’s grade based on marks obtained, using an if-else ladder. C Program #include <stdio.h> int main() { float marks; printf(“Enter marks obtained (out of 100): “); scanf(“%f”, &marks); if (marks < 0 || marks > 100) { printf(“Invalid marks.\n”); } else if (marks >= 90) { printf(“Grade: A+\n”); } else if … Read more
This program reads the radius of a circle and calculates its area and circumference using basic arithmetic operators. C Program #include <stdio.h> int main() { float radius, area, circumference; const float PI = 3.14159; printf(“Enter the radius of the circle: “); scanf(“%f”, &radius); area = PI * radius * radius; circumference = 2 * PI … Read more
This program checks whether a given n x n matrix is a symmetric matrix — meaning the matrix equals its own transpose — and displays the result along with the original matrix. C Program #include <stdio.h> int main() { int n, i, j; int a[10][10]; int isSymmetric = 1; printf(“Enter order of square matrix (n): … Read more
This program finds the largest and smallest elements in a one-dimensional array by scanning through it once and keeping track of the current maximum and minimum. C Program #include <stdio.h> int main() { int n, i; int arr[100]; printf(“Enter number of elements: “); scanf(“%d”, &n); printf(“Enter %d elements: “, n); for (i = 0; i … Read more
This program builds a simple calculator that performs addition, subtraction, multiplication, and division based on the user’s menu choice, using a switch statement. C Program #include <stdio.h> int main() { int choice; float num1, num2, result; printf(“Enter two numbers: “); scanf(“%f %f”, &num1, &num2); printf(“Choose an operation:\n”); printf(“1. Addition\n2. Subtraction\n3. Multiplication\n4. Division\n”); printf(“Enter your choice … Read more
This program prints all natural numbers from 1 to a number n entered by the user, using a goto statement to create a loop-like jump. C Program #include <stdio.h> int main() { int n, i = 1; printf(“Enter n: “); scanf(“%d”, &n); loop: if (i
This program reads the three sides of a triangle and determines whether it is equilateral, isosceles, scalene, or not a valid triangle at all — using nested if-else statements. C Program #include <stdio.h> int main() { float a, b, c; printf(“Enter the three sides of the triangle: “); scanf(“%f %f %f”, &a, &b, &c); if … Read more
This program shows how to swap the values of two variables without using a temporary (third) variable, using arithmetic operators. C Program #include <stdio.h> int main() { int a, b; printf(“Enter value of a: “); scanf(“%d”, &a); printf(“Enter value of b: “); scanf(“%d”, &b); printf(“\nBefore swapping: a = %d, b = %d\n”, a, b); a … Read more