Pyramid Problem No. 80

 Q.80 Even-odd number star pyramid as:

1
*2
1*3
*2*4
1*3*5

Solving in C:

#include <stdio.h>
    int main(){
        int row,col;
        for(row=1; row<=5; row++){
            for(col=1;col<=row; col++){
                if((row%2==0 && col%2==1) || (row%2==1 && col%2==0)) printf("*");
                else printf("%d",col);
            }
            printf("\n");
        }
        return 0;
    }