三角形问题

1.

 

cengshu=int(input("层数:"))
for i in range(0,cengshu):
    for j in range(0,2*i+1):
     print("*",end='')
    print()#print有自动换行的功能

2.

 

cengshu=int(input("层数:"))
for i in range(0,cengshu):
    for k in range(0, cengshu - i):
        print("1", end='')
    for j in range(0,2*i+1):
     print("*",end='')
    for kk in range(0, cengshu - i):
        print("1", end='')
    print()#print有自动换行的功能

3.

 

cengshu=int(input("层数:"))
for i in range(0,cengshu):
    for k in range(0, cengshu - i):
        print(" ", end='')
    for j in range(0,2*i+1):
     print("*",end='')
    for kk in range(0, cengshu - i):
        print(" ", end='')
    print()#print有自动换行的功能

4.

 

cengshu=int(input("层数:"))+1
for i in range(1,cengshu):
    for j in range(0,i):
     print("*",end='')
    print()#print有自动换行的功能

5.

cengshu=int(input("层数:"))+1
for i in range(1,cengshu):
    for k in range(0,cengshu-i):
        print('1',end='')
    for j in range(0,i):
     print("*",end='')
    for k in range(0,cengshu-i):
        print('1',end='')
    print()  # print有自动换行的功能

 

 6.

cengshu=int(input("层数:"))+1
for i in range(1,cengshu):
    for k in range(0,cengshu-i-1):
        print(' ',end='')
    for j in range(0,i):
     print("*",end='')

    print()  # print有自动换行的功能

7.

cengshu=int(input("层数:"))+1
for i in range(1,cengshu):

    for j in range(0,i):
     print("*",end='')
     print(' ', end='')
    print()  # print有自动换行的功能

 8.空心三角形

 

num=int(input("层数:"))
for i in range(num):
    tab = False
    for j in range(i+1):
        if i!=num-1:
            if j==i:
                tab=True
            if(i==j or j==0):
                print("*",end='')
            else:
                print(" ",end='')
        else:
            print("*",end='')
    if tab:
        print()