while(布尔型表达式){
//执行语句
}
package com.xujing.scanner;
public class WhileDemo01 {
public static void main(String[] args) {
int i=1;
int s=0;
while(i<=100){
s+=i;
i++;
}
System.out.println(s);
}
}
do while
do{//执行语句
}
while(布尔型表达式)；
package com.xujing.scanner;
public class DoWhileDemo01 {
public static void main(String[] args) {
int i=1;
int s=0;
do{
s+=i;
i++;
}while (i<=100);
System.out.println(s);
}
}
for
for(初始值；布尔值表达式；更新){
//执行语句
}
package com.xujing.scanner;
public class ForDemo01 {
public static void main(String[] args) {
int s=0;
for (int i = 0; i <=100; i++) {
s+=i;
}
System.out.println(s);
}
}
package com.xujing.scanner;
public class ForDemo02 {
public static void main(String[] args) {
int jis=0;
int ous=0;
for (int i= 0; i<= 100; i++) {
if(i%2==0){
ous+=i;
}
else{
jis+=i;
}
}
System.out.println(ous);
System.out.println(jis);
}
}
package com.xujing.scanner;
public class ForDemo03 {
public static void main(String[] args) {
for (int i = 0; i <= 1000; i++) {
if(i%5==0){
System.out.print(i+" ");
}
if(i%15==0){
System.out.println();
}
}
}
}
package com.xujing.scanner;
public class ForDemo04 {
public static void main(String[] args) {
for (int i = 0; i < 10; i++) {
for (int j = 1; j <= i; j++) {
System.out.print(j+"*"+i+"="+(i*j)+" ");
}
System.out.println();
}
}
}
