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<title>Document</title>
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<!-- 算术运算符
+-*/% ++ --
-->
<script>
var a=10;
var b=20;
var c =a+b;
console.log(c);
var c1=a-b;
console.log(c1);
var c2=a*b;
console.log(c2);
var c3=a/b;
console.log(c3);
var c4=a%b;
console.log(c4);
//先赋值再自增
var i=1;
var c5=i++;
console.log(c5);
//先自增再赋值
var j=1;
var c6=++j;
console.log(c6);
</script>
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