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JavaScript to extract a number from string

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JavaScript is usually provided with a string of user input from HTML forms fields. We’ve been living with this fact for decades, but developers sometimes need to extract the numbers from that string. There are many ways to get these numbers, but let’s use regular expressions to extract them!

You can use a regular-expression to find the number in a string. d+:

const string = 'x12345david';
Const [match] = string.match(/(d+)/);
match; // 12345

Regular expressions can be used to perform powerful operations in JavaScript. This is one of the easiest operations. Converting the number by using a Number()The wrapper will provide you with the number in a Number type.

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