# File: ChapterControlFunc/triangles.py """how many lines? 3 Triangle 1 * ** *** Triangle 2 *** ** * Triangle 3 * ** *** Triangle 4 *** ** * """ def main(): n = int(input( "how many lines? " )) print("Triangle 1") for i in range( n ): for j in range( i+1 ): print("*",end='') print() print("\nTriangle 2") for i in range( n, 0, -1 ): for j in range( i ): print("*",end='') print() print("\nTriangle 3") for i in range( n ): for j in range( n-i-1 ): print(" ",end='') for j in range( i+1 ): print("*",end='') print() print("\nTriangle 4") for i in range( n-1, -1, -1 ): for j in range( n-i-1 ): print(" ",end='') for j in range( i+1 ): print("*",end='') print() main()