do-while loop javascript

In javascript, do-while loop is the only loop which executes at least once, if the condition is false.
because it iterates first and then checks the condition.

Syntax

initialization;  // outside of loop

do {
 // set of statements
  iteration;
}
while (condition);

Example

<script>
let i = 0;

do{
  document.write(i);
   i++;
} while(i < 20);
</script>

In above example, do-while loop prints number from 0 -19.