To match any string containing a sequence of N p’s with JavaScript RegExp, use the p{N} Quantifier.
Example
You can try to run the following code to match any string containing a sequence of N p’s −
<html> <head> <title>JavaScript Regular Expression</title> </head> <body> <script> var myStr = "Welcome 1, 100, 10000, 1000"; var reg = /\d{3}/g; var match = myStr.match(reg); document.write(match); </script> </body> </html>