Indent numerous lines with VIM?

As an example, I'm editing and enhancing this code :

<html>
<body>
<script>
var a = 10;
a += 100;
</script>
</body>
</html>


currently I require to indent the manuscript line :

<html>
<body>
<script>
var a = 10;
a += 100;
</script>
</body>
</html>


How could I do this without relocating arrow to the begin of each line and also press Tab?

0
2019-12-06 14:37:53
Source Share