Analysis of the difference between javascript while statement and do while statement_javascript skills

while statement:

Copy code The code is as follows:

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

do while statement:

Copy code The code is as follows:

var i = 1;
do
{
document.write(i);
i ;

}while(i<10);

From the above example, let’s analyze their two points Difference:

1. Because the while statement always detects the loop expression first, its loop body may not be executed once; while the do/while statement detects the loop expression at the bottom of the loop, so its loop The body will be executed at least once.
2. A semicolon should be added at the end of the do/while statement. This is because it ends with a loop condition instead of simply using curly braces to mark the end of the loop body.​