while循環:
public class Five62 {
public static void main(String[] args) {
int head=100;
int sum=0;
while(head<=200) {
sum+=head;
head++;
}
System.out.println(sum);
}
}
do...while循環:
public class Five62 {
public static void main(String[] args) {
int head=100;
int sum=0;
do {
sum+=head;
head++;
}while(head<=200);
System.out.println(sum);
}
}
for循環:
public class Five62 {
public static void main(String[] args) {
int sum=0;
for(int head=100;head<=200;head++) {
sum+=head;
}
System.out.println(sum);
}
}
100+101+102+...+200=(100+200)*101/2=15150