pattern printing-c

Write a program that receives a number as input and prints it in the following format as shown below.

Examples:

Input:

6

Output:

1

2*3

4*5*6

7*8*9*10

11*12*13*14*15

16*17*18*19*20*21

16*17*18*19*20*21

11*12*13*14*15

7*8*9*10

4*5*6

2*3

1

Input2:

3

Output2:

1

2*3

4*5*6

4*5*6

2*3

1

Source code:

#include <stdio.h>

int main(void) {

            // your code goes here

int n,a=1,i,j;

scanf("%d",&n);

int m[n][n],k,l;

for(i=0;i<n;i++){

    for(j=0;j<=i;j++){

        m[i][j]=a;

        printf("%d",a++);

        if(j!=i){

        printf("*");

       // m[i][j]='*';

    }

}

printf("\n");

            }

            for(k=n-1;k>=0;k--){

                for(l=0;l<=k;l++){

                    printf("%d",m[k][l]);

                    if(l!=k)

                    printf("*");

                   

                }

                printf("\n");

            }

            return 0;

}