Getting Started with javascript: 004-js of gaze and basic operators

JS's gaze
JS In addition to staring and ordinary writing C # code is almost the same. There are//and/* * * * These two kinds.
Single Gaze
Use double slash
Like what.

<script type= "Text/javascript" >//var number-1;//var index=2;</script>

MultiRow Gaze
Use/* content */
Like what

<script type= "Text/javascript" >/* var number-1; var index=2; */</script>

The basic operator of JS
The basic operators in JS are basically the same as the basic operators of the programming languages we often use, such as the following:
Arithmetic operators: +,-, *,/,%,++,--
Assignment operator: =,+=,-=,*=,/=,%=
Comparison operator: ==,!=,>,<,>=,<=
Ternary operators:
?

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Getting Started with javascript: 004-js of gaze and basic operators