What is the best way to grab just the whole number from a string in JavaScript?

Question

I'm facing an issue with a specific string format:

const value = "value is 10";

My goal is to retrieve the integer 10 from this string and store it in a separate variable. How can I achieve this efficiently?

Answer 1

Answer №1

One way to achieve this is by utilizing regular expressions:

const number = +("The number is 20".replace(/\D/g, ""));

The pattern \D will match any character that is not a digit.

Answer 2

One way to achieve this is by utilizing regular expressions:

const number = +("The number is 20".replace(/\D/g, ""));

The pattern \D will match any character that is not a digit.

Answer 3

To extract a numeric value from a string, you can utilize regular expressions

var exampleString = "The price is $20";
var extractedNumber = exampleString.match(/\d+/)[0]; // "20"
console.log(extractedNumber);

Answer 4

To extract a numeric value from a string, you can utilize regular expressions

var exampleString = "The price is $20";
var extractedNumber = exampleString.match(/\d+/)[0]; // "20"
console.log(extractedNumber);

Answer 5

To extract all the digits from a string, you can employ string matching and then concatenate them to form a number as a string before parsing it.

parseInt(input.match(/\d/g).join(''))

Keep in mind that if your input string is something like 'The number 7 comes after 10', the method will yield 710 instead of separate numbers.

Answer 6

To extract all the digits from a string, you can employ string matching and then concatenate them to form a number as a string before parsing it.

parseInt(input.match(/\d/g).join(''))

Keep in mind that if your input string is something like 'The number 7 comes after 10', the method will yield 710 instead of separate numbers.

Answer 7

To achieve this, utilize regex in the following manner:

const  regexPattern = /\d+/g;

const output = yourString.match(regexPattern);

Answer 8

To achieve this, utilize regex in the following manner:

const  regexPattern = /\d+/g;

const output = yourString.match(regexPattern);