**Write a program in C to check if the number that the user has entered is even or odd**

//check whether the number taken from the user is even or odd #include<stdio.h> #include<conio.h> void main() { clrscr(); int i,z; printf("enter number\n"); scanf("%d", &i); z=i%2; if (z==0) { printf("Number is even"); } else { printf("Number is odd"); } getch(); }

Next, try writing a program to check if given year is a leap year or not. It’s the same as the above code, with just a few minute changes.

**Write a program in C to check if the number that the user has entered is positive or negative**

//check if number is positive or negative #include<stdio.h> #include<conio.h> void main() { clrscr(); int i, a; printf("Enter the number\n"); scanf("%d",&i); if(i>0) { printf("Number is positive"); } if(i<0) { printf("Number is negative"); } if(i==0) { printf("Number entered is 0"); } getch(); }

**WAP (Write a program) in C to find the greatest among three numbers with if statements and without using logical operators**

//largest among three numbers without using logical operators #include<stdio.h> #include<conio.h> void main() { clrscr(); int i, j, k, z; printf("Enter numbers\n"); scanf("%d%d%d",&i,&j,&k); if(i>j) { if(i>k) { printf("The first number is the greatest"); } else { printf("The third number is the greatest"); } } if(i<j) { if(i<k) { if(j>k) { printf("second number is largest"); } else { printf("The third number is the greatest"); } } else { printf("j is greatest"); } } if(i==j) { if(i>k) { printf("i and j are equal and greater than k"); } if(i<k) { printf("k is the largest number"); } if(i==k) { printf("All three numbers are equal"); } } getch(); }

**Write a program in C to find the greatest among three numbers using logical operators**

//find greatest of three numbers using logical operators #include<stdio.h> #include<conio.h> void main() { clrscr(); int i,j,k; printf("Enter the three numbers\n"); scanf("%d%d%d",&i,&j,&k); if((i>j)&&(i>k)) { printf("i is the largest"); } if((j>i)&&(j>k)) { printf("j is the greatest"); } if((k>i)&&(k>j)) { printf("k is greatest"); } if((i==j)&&(i>k)) { printf("i and j are equal and greater than k"); } if((i==j)&&(i<k)) { printf("k is the greatest"); } if((i==j)&&(j==k)) { printf("all the numbers are same"); } getch(); }