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How to remove the last digit of a number and execute the remaining digits in JavaScript?
Before the introduction of Bitwise operators, a number is first converted into a string and later on, using string methods, some part of that number is sliced and the remaining part is executed. Here type-conversion i.e a number into a string is necessary. But the introduction of Bitwise or has made the task very easy. When Bitwise or is used there is no necessity of type-conversion and there is no need of using any kind of string methods, reducing the effort and length of the code.
Example
In the following example, a string method called "string.substring()" is used to remove the last digit of a number.
<html> <body> <script> var str = '2345'; document.write((str.substring(0, str.length - 1))); </script> </body> </html>
Output
234
But after the advent of Bitwise or, the type conversion and string methods are nowhere in the picture. Bitwise or has made the code very concise.
Example
<html>
<body>
<script>
document.write(2345 / 10 | 0)
document.write("</br>");
document.write(2345 / 100 | 0)
document.write("</br>");
document.write(2345 / 1000 | 0)
</script>
</body>
</html>Output
234 23 2
Updated on 30-Jun-2020 15:02:01
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