python课件-for 循环语句与函数.pptx

for 循环语句与函数回顾上一节数学函数流程图选择(分支)结构循环结构break和continue猜数游戏“看商品，猜价格”猜数游戏由计算机随机生成一个1到100范围内的整数A，玩家来猜测这数是多少，如果猜中则游戏结束；猜不中，计算机告诉玩家是猜大了还是猜小了，玩家继续猜。输入：玩家猜测的数输出：{猜中，猜大，猜小}之一方法：①随机生成一个1到100范围内的整数A； ②计算机比较A与玩家猜数的大小； ③猜中结束，猜不中提示大小, 然后继续。开始随机生成Aimport randomA=random.randint(1,101)while True:iPlayer=int(raw_input(Guess number))if iPlayerA: print too lowelif iPlayerA: print too highelse: print bingo!! guess number is,A break玩家输入BTB A?小B A?大FFFTnot(A ==B)?T猜中结束主要内容1for循环语句2双重循环3 函数4 参数传递与返回值5 作用域for循环语句计算1+2+3+…+10的值开始????？?TF?输出结束for循环语句i = initialValue # Initialize loop-control variablewhile i endValue: # Loop body ... i++ # Adjust loop-control variablefor i in range(initialValue, endValue): # Loop bodyfor循环语句sum = 0for i in range(1,10): sum+=iprint“sum is”, sumrange(a, b) for v in range(4, 8):... print(v)...4567range(b)=range(0,b) for i in range(4):... print(i)...0123range(a, b, step) for v in range(3, 9, 2):... print(v)...357range(a, b, step) for v in range(5, 1, -1):... print(v)...5432sequence str=“hello”... for v in str:... print(v)...hellosequence list=[1,3,5,6]... for v in list:... print(v)...1356for循环语句i=input()sum=1for k in range(1,i+1):sum+=1.0/(math.factorial(k))for循环语句i = input()sum = 1sign = -1for k in range(1,i+1):sign *= (-1)term = sign/(2*k-1.0)sum+=4*termfor循环语句for循环语句双重循环print(“ Multiplication Table)# Display the number titleprint ,for j in range(1,10): print , j,print # Jump to the new lineprint =========================================“# Display table bodyfor i in range(1,10): print i, |, for j in range(1,10): # Display the product and align properly print format(i * j,4d), print # Jump to the new line函数问题求1 to 10, 20 to 37, 35 to 49的和.问题?sum = 0for i in range(1, 11): sum += iprint(Sum from 1 to 10 is, sum)sum = 0for i in range(20, 38): sum += iprint(Sum from 20 to 37 is, sum)sum = 0for i in range(35, 50): sum += iprint(Sum from 35 to 49 is, sum)解决办法-函数def sum(i1, i2): result = 0 for i in range(i1, i2 + 1): result += i return