函数中return和print的区别

Question

Can anyone explain why we get different output using print and return?

For this code:

def string(txt):
    for char in txt:
        print(char)

string('Stack')

the output would be:

S
t
a
c
k

And for this code:

def string1(txt):
    for char in txt:
        return char

string1('Stack')

the output would be:

'S'

Answer 1

当您使用 return 函数停止并返回一个值时，它会跳出循环

Answer 2

As soon as you use return you would return the value and leave the function.

def string(txt):
    for char in txt:
        print(char)
        return

string('Stack')

This code would also only print an "S" as your example with return. Because return as the word say return to the position you called it.

Answer 3

Both functions iterate through the characters of the txt parameter, but the first one, string uses the return statements, which breaks the iteration and returns the first character to the caller. This is why you see only the S of Stack

print on the other hand outputs all the characters in order to the standard output , and returns only after the loop is finished.