Thread: Help with Nested For Loop

Use a loop inside a loop to create the following pattern:

ABCDE
ABCD
ABC
AB
A

This is what I got, I got the answer by trial and error and still don't understand how this works. Can anyone help explain How these nested for loops work, what statements control what (row/column). Or if there's another answer possible.

Thanks in advance.

Code:

#include <stdio.h>
int main(void)

{

    const int ROWS = 5;
    const int CHARS = 5;
    int row;
    char ch;

    for (row = 0; row < ROWS; row++)
    {
        for (ch = ('F' - CHARS);  ch < ('F' - row); ch++)

            printf("%c", ch);

        printf("\n");

    }

    return 0;

}

This might make it easier to understand...

Code:

int row;
int col;

for (row = 1; row <= 5; row++) {
  printf("Row %d : ", row);
  for (col = 1; col <= 6 - row; col++) {
    printf("Col %d, ", col);
  }
  printf("\n");
}

That way you don't have to worry about the character conversions while you try to figure out what the for loops are doing.

Finally... an explanation thanks, you saved me lots of time and a headache.

THanks again

No problem - to be honest, the character conversions and "math" confused me.