Triangle pattern using python 

1.Normal triangle 

for i in range(1,5):

 for j in range(i,4):

  print(end=" ")

 for k in range(0,(2*i)-1):

  print("*",end=" ")

 print()

2.Inverted triangle 

for i in range(5,0,-1):

 for j in range(i,4):

  print(end=" ")

 for k in range(0,(2*i)-1):

  print("*",end=" ")

 print()

3.Right angled triangle 

for i in range(1,5):

 for k in range(0,(2*i)-1):

  print("*",end=" ")

 print()