#include<stdio.h>
int main()
{
    int rows , i , j ;

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

     for( i=1 ; i <=rows ; i++)
    {
        for( j=i ; j<rows ; j++)
        {
            printf(" ");
        }
        for(j=1 ; j<=2*i-1 ; j++)
        {
            printf("*");
        }
        printf("\n");
    }
    return 0;
}
OUTPUT :

 Enter the number of rows : 3

     *
  ***
*****
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