The difference analysis of JavaScript while statement and do While statement _javascript skill

While statement:

Copy Code code as follows:

var i = 1;
while (I<10)
{
document.write (i);
i++;
}

Do While statement:

Copy Code code as follows:

var i = 1;
Todo
{
document.write (i);
i++;

}while (I<10);

From the example above, let's analyze their two-point differences:

1. Because the while statement always detects the loop expression first, its loop body may not execute at once, and the Do/while statement detects the loop expression at the bottom of the loop, so its loop body is executed at least once.
A semicolon is added to the end of the 2.do/while statement because it ends with a looping condition rather than simply using curly braces to mark the end of the loop body.