Python-while循环、for循环、range对象

while循环结构

#while循环 #打印1-10 num=0 while num<=10:     print(num)     num += 1 #计数1-100数字的累加和 num2 = 0 sum_all=0 while num2<=100:     sum_all = sum_all + num2     num2 += 1 print(sum_all)

for循环和可迭代对象遍历

range对象

#for循环 for x in (10,20,30):     print(x*3) for y in "abcdefg":     print(y) d={"name":"spy","age":18,"job":"test"} for z in d:     print(z) for z in d.keys():     print(z) for z in d.values():     print(z) for z in d.items():     print(z) #range对象 for x in range(5): #打印01234     print(x) sum_all=0 sum_odd=0#奇数和 sum_even=0#偶数和 for x in range(101): #列表1-100依次赋值x     sum_all += x     if x%2 ==1:         sum_odd+=x     else:         sum_even+=x print(sum_all,sum_odd,sum_even)