Print(“hello word!”)#打印hello word!向python世界发生第一声呐喊，仪式很重要
定义变量
name=”Alex Li”
name2=name
print(“my name is “,name,name2)
输出结果：my name is Alex Li Alex Li
name=”paoche ge”
print(name,name2)
输出结果： paoche ge Alex Li #nam2通过name找到Alex的内存地址,name重新赋值，会开辟另一个内存地址存paoche ge,name2还是alex
变量赋值不能有空格，第一个字符必须是（字母或_，可有字母，_和数字组成，大小写敏感）
PIE=3.1415296 #可以用大写字母表示常量
input
1 name=input("name:")2 age=int(input("age:")) #interger3 job=input("job:")4 salary=input("salary:")
格式输出
1 info=""""------info of {_name}----- 2 Name={_name} 3 Age={_age} 4 Job={_job} 5 Salary={_salary} 6 ---------end-------""" 7 .format(_name=name, 8 _age=age, 9 _job=job, 10 _salary=salary) 11 print(info) 12 13 info2= 14 """------info of %s----- 15 Name=%s 16 Age=%d 17 Job=%s 18 Salary=%S 19 ---------end-------"""%(name,name,age,job,salary) 20 Print(info2) 21 22 info3 = 23 =""""------info of {0}----- 24 Name={0} 25 Age={1} 26 Job={2} 27 Salary={3} 28 ---------end-------""".fomat(name,name,age,job,salary) 29 print(info3)
while循环
1 age_of_oldboy=56 2 count=0 3 while count<3: #判断循环条件 4 guess_age = int(input("guess age:")) # input默认读取字符串 5 if guess_age==age_of_oldboy: 6 print("yes,good!") 7 break 8 elif guess_age > age_of_oldboy: 9 print("think smaller") 10 else: 11 print("think bigger") 12 count +=1 13 if count==3: 14 print("fuck off") """也可以不用elif age_of_oldboy=56 count=0 while count<3: #判断循环条件 guess_age = int(input("guess age:")) # input默认读取字符串 if guess_age==age_of_oldboy: print("yes,good!") break if guess_age > age_of_oldboy: print("think smaller") if guess_age < age_of_oldboy: print("think bigger") count +=1 else: print("fuck off") """
guess任性玩
1 age_of_oldboy=56 2 count=0 3 while count<3: #判断循环条件 4 guess_age = int(input("guess age:")) # input默认读取字符串 5 if guess_age==age_of_oldboy: 6 print("yes,good!") 7 break 8 elif guess_age > age_of_oldboy: 9 print("think smaller") 10 else: 11 print("think bigger") 12 count +=1 13 if count==3: 14 print("are you want to try again?") 15 continue_result=input("") 16 if continue_result==("no")or continue_result==("n"): 17 count==4 18 else: 19 count=0
for循环
1 for i in range(10):2 print("------",i)3 for j in range(10):4 print(j)5 if j>5:6 break #跳出当前整个循环//continue 是跳出本次循环继续下次循环
for循环之猜年龄
1 age_of_oldboy=56 2 i=0 3 for i in range (3): #判断循环条件 4 guess_age = int(input("guess age:")) # input默认读取字符串 5 if guess_age==age_of_oldboy: 6 print("yes,good!") 7 break 8 elif guess_age > age_of_oldboy: 9 print("think smaller")10 else:11 print("think bigger")12 i+=113 if i==3:14 print("fuck off")1516 for i in range(0,10,3): #从0开始到10结束，每隔三个打印一个17 print("loop",i)18 for i in range(10):19 print("------",i)20 for j in range(10):21 print(j)22 if j>5:23 break #跳出当前整个循环//continue 是跳出本次循环继续下次循环
