在千峰逆战班的学习的第8天;
JAVA_DAY6;
今天学的课程有循环结构;
中国加油!世界加油!
我自己加油!
public class Java_day6{
public static void main(String[]args){
/*
求1+3+...+99
*/
int i1=1;
int sum1 = 0;
while(i1<=99){
sum1+=i1;
i1 = 2*i1+1;
}
System.out.println("while语句得到:"+sum1);
//++++++++++++++++
int i2 = 1;
int sum2 = 0;
do{
sum2+=i2;
i2 = 2*i2+1;
}while(i2<=99);
System.out.println("dowhile语句得到的"+sum2);
//+++++++++++++++
int sum3 = 0;
for(int i3 = 1;i3<=99;i3 = 2*i3+1){
sum3+=i3;
}
System.out.println("for语句得到的"+sum3);
/*
行酒令:逢7过
*/
for(int i = 1;i<=100;i++){
if(i%100/10==7||i%10==7||i%7==0){
System.out.print("过 ");
}else{
System.out.print(i+" ");
}
}
}
}