dowhile的学习

dowhile 的概念及他与while的区别

 

 

package javaxunhuanjiegou;
​
public class DoWhile {public static void main(String[] args) {int a = 0;int sum = 0;do {sum = sum + a;a++;} while (a <= 100);System.out.println(sum);}
}
​

我们来跟直观的感受一下

于while是先判断在执行 而dowhile是先执行在判断所以会dowhile的代码部分输出结果为0

 

package javaxunhuanjiegou;
​
public class DoWhile {public static void main(String[] args) {int a=0;while (a<0){a++;System.out.println(a);}do {System.out.println(a);a++;}while (a<0);
​}
}
​