Question

用java语言编程：1到100的累计和的程序代码是什么

Answer 1

public class Add {
public static void main(String[] args) {
int sum=0;
int i =1;
while(i<101){
sum +=i;
i++;
}
}
System.out.println("sum="+sum);
}
}

Answer 2

public class Add {

/**
* @param args
*/
public static void main(String[] args) {
int sum=0;
for(int i=1;i<=100;i++){
sum=sum+i;
}
System.out.println("sum="+sum);
}
}

Answer 3

public static void main(String[] args) {
int sum=0;
for(int i=1;i<=100;i++){
sum+=i;
}
System.out.println("和:"+sum);
}

Answer 4

100*(1+100)/2