for 循环

result = 'hello,world'for i in result:    print(i)    l = [1,2,3,4,5]for i in l:    print(i)info = {    'name': 'aaa',    'age': 18,    'job': 'it'}for i in info.values(): #默认循环key，加.values()循环values    print(i)t = (1,2,3,4,5)for i in t:    print(i)for i in range(0,10,2):#2是步长    print(i)for i in range(10):    if i == 7:        continue    print(i)

while循环（break，pass）

count = 0while count < 10:    count += 1  # count = count + 1    print('ha-%s' % count)i = 0l = ['a', 'b', 'c', 'd','e']while i < len(l):    if i == 2:        pass    print(l[i])    i += 1while i < len(l):    if i == 2:        break    print(l[i])    i += 1count = 0while True:    print('ha-%s' % count)

break语句

for letter in 'holleworld':        if letter == 'e':      break   print('当前字母 :', letter)

输出e之前的

continue语句

for letter in 'holleworld':    if letter == 'e':      continue   print('当前字母 :', letter)跳过e

pass语句

for letter in 'holleworld':       if letter == 'e':      pass   print('当前字母 :', letter)