do...while
statement
creates a loop that executes a specified statement until the test condition evaluates to false. The condition is evaluated after executing the statement, resulting in the specified statement executing at least once.
do statement while (condition);
statement
{ ... }
) to group those statements.
condition
condition
evaluates to true, the
statement
is re-executed. When
condition
evaluates to false, control passes to the statement following the
do...while
.
do...while
In the following example, the
do...while
loop iterates at least once and reiterates until
i
is no longer less than 5.
var result = '';
var i = 0;
do {
i += 1;
result += i + ' ';
}
while (i > 0 && i < 5);
// Despite i == 0 this will still loop as it starts off without the test
console.log(result);
| 规范 |
|---|
|
ECMAScript (ECMA-262)
The definition of 'do-while statement' in that specification. |
| Desktop | Mobile | Server | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
do...while
|
Chrome 1 | Edge 12 | Firefox 1 | IE 4 | Opera 4 | Safari 1 | WebView Android 1 | Chrome Android 18 | Firefox Android 4 | Opera Android 10.1 | Safari iOS 1 | Samsung Internet Android 1.0 | nodejs 0.1.100 |
完整支持