The syntax of the toLocaleString() method is:
num.toLocaleString(locales, options)
Here, num is a number.
toLocaleString() Parameters
The toLocaleString() method takes in:
- locales (Optional) - A string specifying which language specific format to use.
- options (Optional) - An object with configuration properties.
To learn more, visit Intl.NumberFormat() constructor.
Return value from toLocaleString()
- Returns a string with a language-sensitive representation of the given number.
Example: Using toLocaleString() method
let number = 400000;
console.log(number.toLocaleString()); // 400,000 if in US English locale
// using locales
let number1 = 123456.789;
// India uses thousands/lakh/crore separators
console.log(number1.toLocaleString("en-IN")); // 1,23,456.789
// using options
let currency = number1.toLocaleString("de-DE", {
style: "currency",
currency: "EUR",
maximumSignificantDigits: 3,
});
console.log(currency); // 123.000 €
Output
400,000 1,23,456.789 123.000 €
Recommended Reading: