For pound (£) there is HTML code £.
For INR can you please tell me the HTML code?
Here is one more example based on Intl.NumberFormat native api.
var number = 123456.789;
// India uses thousands/lakh/crore separators
console.log(new Intl.NumberFormat('en-IN', {
style: 'currency',
currency: 'INR',
// limit to six significant digits (Possible values are from 1 to 21).
maximumSignificantDigits: 6
}).format(number));