Reverse a number
In this exercise we will try to write code to reverse any number.
For this exercise we chose a random number to test our code with:
Example Input: 39582Expected Output: 28593
First time I converted the number into a string, I used the split() method, then the reverse() method and the last time join() to bring it all together.
I named the function "reverse_a_number", but it can have any name you want.
There are different ways to convert number to string :
- String literal -> str = "" + num + "";
- String constructor -> str = String(num);
- toString -> str = num.toString();
- String Literal simple -> str = "" + num;
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HTML:
<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>Reverse a number</title>
<script src="javascript.js"></script>
</head>
<body>
<p>Open console log!</p>
</body>
</html>
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JavaScript:
function reverse_a_number(n)
{
n = n + "";
return n.split("").reverse().join("");
}
console.log(Number(reverse_a_number(39528)));
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