Write a program for following output in C

Question

1*8+1= 9
12*8+2=98
123*8+3=987
1234*8+4=9876
12345*8+5=98765
123456*8+6=987654
1234567*8+7=9876543
12345678*8+8=9876543 2
123456789*8+9=987654 321

Answer 1

Here is the code for above (Tested):

#include <stdio.h>

int main()
{
    int n, i, j;
    int sum;

    printf("Enter the number of itration : ");
    scanf("%d", &n);

    for (i = 1, j = 1; i <= n; i++, j = j * 10 + i) {
        sum = j * 8 + i;
        printf("%d * 8 + %d = %d\n", j, i, sum);
    }

    return 0;
}

Sample output:

Enter the number of itration : 9
1 * 8 + 1 = 9
12 * 8 + 2 = 98
123 * 8 + 3 = 987
1234 * 8 + 4 = 9876
12345 * 8 + 5 = 98765
123456 * 8 + 6 = 987654
1234567 * 8 + 7 = 9876543
12345678 * 8 + 8 = 98765432
123456789 * 8 + 9 = 987654321