Printing of Isosceles Triangle of Star

//prints isosceles triangle of star//

#include<stdio.h>

#include<conio.h>

main()

{

      int row, clm, space;

      for(row = 1; row <= 20; row+=2)

      {

               

              //printing spaces//

              for(space=18; space >= row; space-=2)

                      {

                              printf("%c",' ');

                      }

              //printing stars//

              for(clm = 1; clm <=(row); clm++ )

              {

              printf("*");

              }

       printf("\n");

      }

getche();

return 0;

}

Printing Right Angel Triangel of Stars (Right angel at upper right corner)

//prints triangle of star with right angle at upper right corner//

#include<stdio.h>

#include<conio.h>

main()

{

      int row, clm,space;

      for(row = 1; row <= 10; row++)

      {

              //printing spaces//

              for(space=2; space <= row; space++)

              {

                      printf("%c",' ');

              }

                     

              //printing Stars//

              for(clm = 9; clm >=row; clm--)

              {

                      printf("%c",'*');

              }

              printf("\n");

      }

getche();

return 0;

}

Printing Right Angel Triangel of Stars (Right angel at lower right corner)

//prints triangle of star with right angle at lower right corner//

#include<stdio.h>

#include<conio.h>

main()

{

      int row, clm, space;

      for(row = 1; row <= 10; row++)

      {

                      //printing spaces//

                      for(space=9; space >= row; space--)

                      {

                              printf("%c",' ');

                      }

                      //printing Stars//

                      for(clm = 1; clm <=row; clm++)

                      {

                              printf("%c",'*');

                             

                      }

              //going to new line//

              printf("\n");

      }

getche();

return 0;

}