流程控制之do while迴圈
阿新 • • 發佈:2021-06-17
do {
//程式碼語句
}while(布林表示式);
與while的區別
-
while是先判斷再執行,do while是先執行再判斷
-
迴圈體至少會被執行一次
例項1:
package com.yeyue.struct;
public class DoWhileDemo01 {
public static void main(String[] args) {
int i = 0;
int sum = 0;
do {
sum = sum + i;
i++;
}while (i<=100);
System.out.println(sum);
}
}
例項2:
package com.yeyue.struct;
public class DoWhileDemo02 {
public static void main(String[] args) {
int a = 0;
while (a<0){
System.out.println(a);
a++;
}
System.out.println("============================");
do{
System.out.println(a);
a++;
}while(a<0);
}
}