#include <stdio.h>

int main() {
    int number;
    printf("Enter an integer: ");
    scanf("%d", &number);
    printf("You entered: %d\n", number);
    return 0;
}

#include <stdio.h>

int main() {
    int a, b, sum;
    printf("Enter two integers: ");
    scanf("%d %d", &a, &b);
    sum = a + b;
    printf("Sum: %d\n", sum);
    return 0;
}

#include <stdio.h>

int main() {
    int a, b;
    printf("Enter two integers: ");
    scanf("%d %d", &a, &b);
    printf("Sum: %d\n", a + b);
    printf("Difference: %d\n", a - b);
    printf("Product: %d\n", a * b);
    printf("Quotient: %d\n", a / b);
    printf("Remainder: %d\n", a % b);
    return 0;
}

#include <stdio.h>

int main() {
    int x, y, temp;
    printf("Enter two integers: ");
    scanf("%d %d", &x, &y);
    temp = x;
    x = y;
    y = temp;
    printf("After swapping: x = %d, y = %d\n", x, y);
    return 0;
}

#include <stdio.h>
int main() {
    int num;
    printf("Enter an integer: ");
    scanf("%d", &num);
    if (num % 2 == 0)
        printf("Even\n");
    else
        printf("Odd\n");
    return 0;
}

if (marks >= 90 && marks <= 100) {
        printf("Grade: A\n");
} else {
        if (marks >= 80) {
                printf("Grade: B\n");
        } else {
                if (marks >= 70) {
                        printf("Grade: C\n");
                } else {
                        if (marks >= 60) {
                                printf("Grade: D\n");
                         } else {
                                printf("Grade: F\n");
                        }
                }
        }
}