4.4 `break` 和 `continue` 语句, 以及循环中的 `else` 子句 `break` and `continue` Statements, and `else` Clauses on Loops

The break statement, like in C, breaks out of the smallest enclosing for or while loop.

break 语句和 C 中的类似，用于跳出最近的一级 for 或 while 循环。

The continue statement, also borrowed from C, continues with the next iteration of the loop.

continue 语句是从 C 中借鉴来的，它表示循环继续执行下一次迭代。

Loop statements may have an else clause; it is executed when the loop terminates through exhaustion of the list (with for) or when the condition becomes false (with while), but not when the loop is terminated by a break statement. This is exemplified by the following loop, which searches for prime numbers:

循环可以有一个 else 子句;它在循环迭代完整个列表（对于 for ）或执行条件为 false （对于 while ）时执行，但循环被 break 中止的情况下不会执行。以下搜索素数的示例程序演示了这个子句：

>>> for n in range(2, 10):
...     for x in range(2, n):
...         if n % x == 0:
...             print n, 'equals', x, '*', n/x
...             break
...     else:
...         # loop fell through without finding a factor
...         print n, 'is a prime number'
...
2 is a prime number
3 is a prime number
4 equals 2 * 2
5 is a prime number
6 equals 2 * 3
7 is a prime number
8 equals 2 * 4
9 equals 3 * 3

4.4 break 和 continue 语句, 以及 循环中的 else 子句 break and continue Statements, and else Clauses on Loops

4.4 `break` 和 `continue` 语句, 以及循环中的 `else` 子句 `break` and `continue` Statements, and `else` Clauses on Loops