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

循环语句支持 ​​else​​​ 子句；​​for​​​ 循环中，可迭代对象中的元素全部循环完毕，或 ​​while​​​ 循环的条件为假时，执行该子句；​​break​​ 语句终止循环时，不执行该子句。 请看下面这个查找素数的循环示例：

>>> 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

（没错，这段代码就是这么写。仔细看：​​else​​​ 子句属于 ​​for​​ 循环，不属于 ​​if​​​ 语句。）与 ​​if​​​ 语句相比，循环的 ​​else​​​ 子句更像 ​​try​​​ 的 ​​else​​​ 子句： ​​try​​​ 的 ​​else​​​ 子句在未触发异常时执行，循环的 ​​else​​​ 子句则在未运行 ​​break​​​ 时执行。​​try​​​ 语句和异常详见 ​异常的处理。​​continue​​ 语句也借鉴自 C 语言，表示继续执行循环的下一次迭代：

>>> for num in range(2, 10):
...     if num % 2 == 0:
...         print("Found an even number", num)
...         continue
...     print("Found an odd number", num)
...
Found an even number 2
Found an odd number 3
Found an even number 4
Found an odd number 5
Found an even number 6
Found an odd number 7
Found an even number 8
Found an odd number 9