age = 20
1+1
print('Hello World!')
运行结果:Hello World!
if 1 == 2:
print("假的")
else:
print("1==2是假的")
运行结果:1==2是假的
for i in range(5):
print(i)
运行结果:
0
1
2
3
4
sum = 0
n = 99
while n > 0:
sum = sum + n
n = n - 1
print(sum)
运行结果:4950
n = 1
while n <= 100:
if n > 10:
break
print(n)
n += 1
运行结果:
1
2
3
4
5
6
7
8
9
10
n = 1
while n < 10:
n = n + 1
if n % 2 == 0:
continue
print(n)
运行结果:
3
5
7
9
for letter in 'Room':
if letter == 'o':
pass
print('pass')
print(letter)
运行结果:
R
pass
o
pass
o
m
a = 3
b = 3.14
c = 3 + 4j
print(type(a), type(b), type(c))
运行结果:
<class 'int'> <class 'float'> <class 'complex'>
a = "Hello"
b = "Python"
print("a + b 输出结果:", a + b)
运行结果:
a + b 输出结果: HelloPython
list = ['abcd', 786 , 2.23, 'runoob', 70.2]
print(list[1:3])
运行结果:[786, 2.23]
t1 = ('abcd', 786 , 2.23, 'runoob', 70.2)
t2 = (1, )
t3 = ('a', 'b', ['A', 'B'])
t3[2][0] = 'X'
print(t3)
运行结果:('a', 'b', ['X', 'B'])
d = {'Michael': 95, 'Bob': 75, 'Tracy': 85}
print(d['Michael'])
运行结果:95
s = set([1, 1, 2, 2, 3, 3])
print(s)
运行结果:{1, 2, 3}