.....
.....
num = 1
while num <=10:
num = num +1
if num == 3:
continue
print(num)
结果：
2
4
5
6
7
8
9
10
11
三行语句不换行
print("hallo word")
print("hallo word")
print("hallo word")
print("hallo word",end ="___")
print("hallo word",end ="___")
print("hallo word",end ="___")
num1 = 0
num2 = 0
while num1<=5:
print(num1,end="_")
num2 = 0
while num2 <=7:
print(num2,end="-")
num2+=1
num1+=1
print(end = "\n") #等价于print()
结果：
0_0-1-2-3-4-5-6-7-
1_0-1-2-3-4-5-6-7-
2_0-1-2-3-4-5-6-7-
3_0-1-2-3-4-5-6-7-
4_0-1-2-3-4-5-6-7-
5_0-1-2-3-4-5-6-7-
