C language loops | while loop 3

Example:11
Write a C program to Print all multiples of 7 up to 70 and print sum of all the nos?
Sol:

#include <stdio.h>

int main()
{
    int i=7,s=0;
    while(i<=70)
    {
        printf("%d\n",i);
        s=s+i;
        i=i+7;
    }
    printf("Sum = %d\n",s);
    return 0;
}

Output:

7
14
21
28
35
42
49
56
63
70
Sum = 385

Example:12
Write a C program to to take input for 5 numbers calculate and print their sum?
Sol:

#include <stdio.h>
int main()
{
    int i=1,n,s=0;
    while(i<=5 )
    {
        printf("Enter any no ");
        scanf("%d",&n);
        s=s+n;
        i=i+1;
    }
    printf("Sum = %d\n",s);
    return 0;
}

Output:

Enter any no 2
Enter any no 3
Enter any no 6
Enter any no 5
Enter any no 4
Sum = 20

Example:13
Write a C program to take input for 3 numbers calculate and print their product?
Sol:

#include <stdio.h>
int main()
{
    int i=1,n,p=1;
    while(i<=3 )
    {
        printf("Enter any no ");
        scanf("%d",&n);
        p=p*n;
        i=i+1;
    }
    printf("Prod = %d\n",p);
    return 0;
}

Output:

Enter any no 2
Enter any no 3
Enter any no 5
Prod = 30

Example:14
Write a C program to take input for 5 nos , check and print total +ve elements entered by the user.
Sol:

#include <stdio.h>
int main()
{
    int i=1,n,p=0;
    while(i<=5)
    {
        printf("Enter any no ");
        scanf("%d",&n);
        if(n>0)
            p++;
        i=i+1;
    }
    printf("Total +ve elements = %d\n",p);
    return 0;
}

Output:

Enter any no 25
Enter any no -96
Enter any no 35
Enter any no -85
Enter any no 4
Total +ve elements = 3

Example:15
Write a C program to take input for 5 nos , check and print total -ve elements entered by the user.
Sol:

#include <stdio.h>
int main()
{
    int i=1,n,p=0;
    while(i<=5)
    {
        printf("Enter any no ");
        scanf("%d",&n);
        if(n<0)
            p++;
        i=i+1;
    }
    printf("Total -ve elements = %d\n",p);
    return 0;
}

Output:

Enter any no 25
Enter any no -5
Enter any no 2
Enter any no -6
Enter any no -7
Total -ve elements = 3

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