python2

输入一个任意类型的数

#import random
from random import randint
import math
input01 = input(“please input a data:”)
a = int(input01) # 转换成整型
print(a)

input01 = input(“please input a data:”)
b = input01 # 任意类型
print(b)

随机数

rand01 = randint(0, 100) # 100以内
print(rand01)
print(math.sqrt(rand01))

分支结构

双分支

a,b=20,30
if a > b:
print(a)
else:
print(b)

if-elif

grade=95
if grade<60:
x=‘E’
elif grade<70:
x=‘D’
elif grade<80:
x=‘C’
elif grade<90:
x=‘B’
elif grade<100:
x=‘A’
print(x)

分支嵌套

if a>10:
print(a)
if b>10:
print(b-20)
else:
print(20-b)
else :
print(a-10)

循环语句 1+2+。。。100

for循环

sum=0
i=0
for i in range(1, 101, 2):
sum=sum+i
print(i)
print(sum)

while循环

sum=0
i=0;
while i<100:
i=i+1
sum=sum+i
print(sum)