python的for循环

for item in ["tom","bob","jerry","li"]:#in 后可跟列表，循环次数和列表元素数相同
    print("hello"+item)

for item in "python":#in 后可跟字符串，循环次数和字符串长度相同
    print("hello"+item)

for item in ("tom","bob","jerry","li"):#in 后可跟元组，循环次数和元组元素数相同
    print("hello"+item)

for item in {"tom":"123","jerry":"456"}:#in 后可跟字典，循环次数和key数相同
    print("hello"+item)

adict={"tom":"123","jerry":"456"}for item in adict:        print(adict[item])

for item in range(10):
    print(item)

for item in range(1,11):
    print(item)

sum=0
for i in range(1,11):
    sum+=i
    if(i==3):  #此处判断i==多少就是加到多少为止
        break
print(sum)

sum=0
for i in range(1,11):
    if i%2!=0:
        continue
    sum+=i

print(sum)

sum=0
for i in range(1,11):
    if i%2==0:  #if not（i%2）
        continue
    sum+=i

print(sum)