The do-while Statement
The do-while statement is like the while statement, except that the associated block always gets
executed at least onc Its syntax is as follows: |
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do {
statement (s)
} while (booleanExpression);
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Just like the while statement, you can omit the braces if there is only one statement within them.
However, always use braces for the sake of clarity.
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public class MainClass {
public static void main(String[] args) {
int i = 0;
do {
System.out.println(i);
i++;
} while (i < 3);
}
}
| This prints the following to the console: |
0
1
2 |
The following do-while demonstrates that at least the code in the do block will be executed once
even though the initial value of j used to test the expression j < 3 evaluates to false. |
public class MainClass {
public static void main(String[] args) {
int j = 4;
do {
System.out.println(j);
j++;
} while (j < 3);
}
}
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| This prints the following on the console. |
4 The do while loop in action
do {
// statements
} while (expression);
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public class MainClass {
public static void main(String[] args) {
int limit = 20;
int sum = 0;
int i = 1;
do {
sum += i;
i++;
} while (i <= limit);
System.out.println("sum = " + sum);
}
}
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sum = 210 http://www.java2s.com/Tutorial/Java/ 0080__Statement-Control/Catalog0080__Statement-Control.htm |
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