python的循环中else子句的必要的应用场景是什么？，python子句,例如python官方文档

python的循环中else子句的必要的应用场景是什么？，python子句,例如python官方文档

例如python官方文档里举得这个例子

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 number3 is a prime number4 equals 2 * 25 is a prime number6 equals 2 * 37 is a prime number8 equals 2 * 49 equals 3 * 3直接这样写不是也能实现同样的功能吗？
  
    
      
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      
    
  
                                                    

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