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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <meta http-equiv="X-UA-Compatible" content="IE=edge">
- <meta name="viewport" content="width=device-width, initial-scale=1.0">
- <title>Document</title>
- <script>
- var n1 = 10 , n2 = 20;
- var n = n1++;
- console.log('n='+n);//10
- console.log('n1='+n1);//11
- n = ++n1;
- console.log('n='+n);//12
- console.log('n1='+n1);//12
- n = n2--;
- console.log('n='+n);//20
- console.log('n2='+n2);//19
- n = --n2;
- console.log('n='+n);//18
- console.log('n2='+n2);//18
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