# 打印左下角三角形：for i in range(10):之后，range(0,i)
# 打印右上角三角形：在左下角的基础上，将"－"变成" "空格
for i in range(10):
for j in range(0,i):
print("-",end=" ")
for j in range(i,10):
print("$", end=" ")
print("")
print("-------------------------")
# 打印左上角三角形：for i in range(10):之后，range(0,10-i)
# 打印右下角三角形：在左上角的基础上，将"－"变成" "空格
for i in range(10):
for j in range(0, 10 - i):
print("-", end=" ")
for k in range(10 - i, 10):
print("$", end=" ")
print("")
# 打印上三角，只需要将"－",去掉
for i in range(10):
for j in range(0, 10 - i):
print(end=" ")
for k in range(10 - i, 10):
print("$", end=" ")
print("")
# 打印倒三角，只需要将"－",去掉
for i in range(10):
for j in range(0,i):
print(end=" ")
for j in range(i,10):
print("$", end=" ")
print("")
