java循环

public class TestWhile1{
    public static void main(String[] args){
    /*int num=1;  //条件初始化
    int result =1;
    while(num<=13){ //条件判断
    result *= num;  //循环体
    num +=2;  //num++ //迭代
    }
    System.out.println(result);*/
    /*int num = 1;
    int result = 0;
    do{
        result += num;
        num += 1;
        
    }while(num<=100); //do while代码至少执行一次，先考试，在判断合格
    System.out.println(result);*/
    int sum = 0;
    for(int i = 1;i<=100;i++){
        sum +=i;
    }
    System.out.println(sum);
    }
}