| 4. 5. 1. The do-while Statement |
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The do-while statement is like the while statement, except that the associated
block always gets executed at least once. |
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);
}
}
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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. |
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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 |