JavaScript – Get the first digit of a number
In this post we will give you information about JavaScript – Get the first digit of a number. Hear we will give you detail about JavaScript – Get the first digit of a numberAnd how to use it also give you demo for it if it is necessary.
we will learn how to get the first of a number in JavaScript.
Getting the first digit of a number
To get the first digit of a number:
Convert the number to a string.
Call the charAt() method on it, by passing the first digit index 0.
It returns the character at that index.
Here is an example:
const id = 13456;const firstDigit = String(id).charAt(0);// converting string back to numberconsole.log(Number(firstDigit));
Output:
1
The charAt() method accepts the character index as an argument and return its value in the string.
Similarly, we can also use the square brackets notation [] in JavaScript to get the first digit of a number.
Here is an example:
const id = 13456;const firstDigit = String(id)[0];// converting string back to numberconsole.log(Number(firstDigit));
Output:
1
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