sum.java

主要是对于JAVA的编程的基本语言 希望能够帮得上你。

package ControlFlow;
//分别用while，do-while和for语句实现累计求和
public class Sum {	
	public static void main(String[] args) {
		System.out.println("**while statement**");
		int n=100,sum=0;
		while(n>0){
			sum+=n;
			n--;
		}
		System.out.println("The sum is "+sum);		
		System.out.println("\n**do-while statement**");
		n=0;
		sum=0;
		do{
			sum+=n;
			n++;
		}while(n<=100);
		System.out.println("The sum is "+sum);		
		System.out.println("\n**for statement**");
		sum=0;
		for(int i=1;i<=100;i++){
			sum+=i;			
		}
		System.out.println("The sum is "+sum);
	}
}