How not cycle to calculate an accumulated 100

　　As stated, first think about their own a minute.

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　　Well, one minute to now reveal the answer: recursion.

　　Know the answer, the problem is solved, and no more than 10 lines of code:　　

public  class the Recursion { 

    // recursive summation, if num is 100, calculated: 100 + 99 + 98 + ... +. 1 
    public  static  int multiplication ( int num) {
         IF (num>. 1 ) {
             return num + multiplication ( NUM -. 1 ); 
        } 
        return NUM; 
    } 

    public  static  void main (String [] args) 
    { 
        System.out.println (multiplication ( 100 )); 
    } 
}

　　run:

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