while(逻辑表达式){
语句块
}
public class qh1{
public static void main(String args\[\]){
int s=0,i=1;
while(i<=100){
s=s+i;
i++;
}
System.out.println("求和值是"+s);
}
}
do-while语句
do{
语句块
}while(逻辑表达式);
public class qh2{
public static void main(String args\[\]){
int s=0,i=1;
do{
s=s+i;//i==1,s==1;i==2,s==3
i++;
}while(i<=100);
System.out.println("求和值是"+s);
}
}
3.for语句
for(初始语句;逻辑表达式;迭代语句){
语句块
}
public class qh2{
public static void main(String args\[\]){
int s=0,i=1;
for(i=1;i<=100;i++){
s=s+i;
}
System.out.println("求和值是"+s);
}
}