#1. 输入
print("****** abc *******",end="")print("****** 123 *******") #== > ****** abc ************* 123 ******* 备注: end=""不换行#2. 运算符
a = input("Please input the first number:")
b= input("Please input the second number:")print("The result %s + %s = %d"%(a,b,(int(a)+int(b)))) #== > The result 10 + 23 = 33#3. list
arrayList = ["abc","123",[123,"345"],[["se","df"]]]
a1=arrayList[0]
a2= arrayList[2][0]
a3= arrayList[3][0][0]print("a1=%s\na2=%d\na3=%s"%(a1,a2,a3)) #== > a1=abc a2=123 a3=se
#4. 计算体重
a4 = 1.75a5= 80.5BMI= a4 / a5**a5if BMI > 32:print("严重肥胖")elif BMI > 28:print("过重")elif BMI < 18.5:print("过轻")else:print("正常")#== > 过轻
#5. 循环遍历
names = ["a","b","c"]for name innames:print("name=%s"%name) #== > name=a name=b name=c
sum=0for x in [1,23,3,3,3,3,3,0,5,5,5,5]:
sum+=xprint("sum=%d"%sum) #== > sum=59
#6. 计算1-100整数的和
listArray = list(range(101))
sum6=0for s6 inlistArray:
sum6+=s6print("0~100的整数和:%d",sum6) #== > 0~100的整数和:%d 5050#7. while循环计算
sum7 =0
a7=0while a7 < 101:
sum7= sum7 +a7
a7+= 1
print("while循环:%d",sum7) #== > while循环:%d 5050
#练习请利用循环依次对list中的每个名字打印出Hello, xxx!:
L = ["Python","Objective-C","Swift"]for L1 inL:print("Hello,%s"%L1) #== > Hello,Python Hello,Objective-C Hello,Swift#8.字典
dictionary = {"WebApp":"Python","iOS":"Objective-C","Android":"java"}
dict8= dictionary["WebApp"] #拿到字典中key为WebApp对应的Value
print("拿到字典中key为WebApp对应的value:%s"%dict8) #== > 拿到字典中key为WebApp对应的value:Python
bool = "iOS" in dictionary #判断key是否在字典中
print("判断key是否在字典中不存在%d"%bool) #== > 判断key是否在字典中不存在1
a8 = dictionary.get("PHP",-1) #字典中的key不存在的话输出-1
print("字典中的key是否存在不存在输出自己设定的值:%d"%a8) #== > 字典中的key是否存在不存在输出自己设定的值:-1
s8 = dictionary.pop("iOS")print("用pop删除key对应的value为%s"%s8) #== > 用pop删除key对应的value为Objective-C#9.set:set和dict类似,也是一组key的集合,但不存储value。由于key不能重复,所以,在set中,没有重复的key
s = set(["1","2","3"])print("打印一个set",s) #== > 打印一个set {'2', '1', '3'}
s = set(["1","2","3","3","2","1"])print("set可以去重",s) #== > set可以去重 {'2', '1', '3'}#add(key)方法可以添加元素到set中,可以重复添加,但不会有效果
s.add(4)print("输出添加元素后的set",s) #== > 输出添加元素后的set {'2', 4, '1', '3'}#通过remove(key)方法可以删除元素:
s.remove(4)print("输出移除后的代码",s) #== > 输出移除后的代码 {'2', '1', '3'}
s1 = set([1,2,3])
s2= set([2,3,4])
s3= s1 &s2print("交集结果",s3) #== > 交集结果 {2, 3}
s4 = s1 |s2print("并集结果",s4) #== > 并集结果 {1, 2, 3, 4}#10.排序
sortArray = ["3","2","1"]
sortArray.sort()print("排序后的数组:",sortArray) #== > 排序后的数组: ['1', '2', '3']#练习: 九九乘法表
m = 1
while m <= 9:
n= 1
while n <=m:print("%d*%d=%-2d"%(n,m,m*n),end="")
n+= 1
print("")
m+= 1
#1*1=1#1*2=2 2*2=4#1*3=3 2*3=6 3*3=9#1*4=4 2*4=8 3*4=12 4*4=16#1*5=5 2*5=10 3*5=15 4*5=20 5*5=25#1*6=6 2*6=12 3*6=18 4*6=24 5*6=30 6*6=36#1*7=7 2*7=14 3*7=21 4*7=28 5*7=35 6*7=42 7*7=49#1*8=8 2*8=16 3*8=24 4*8=32 5*8=40 6*8=48 7*8=56 8*8=64#1*9=9 2*9=18 3*9=27 4*9=36 5*9=45 6*9=54 7*9=63 8*9=72 9*9=81