Write a function name isPrime, which takes an integer as an argument and returns true if the argument is a prime number, or false otherwise. Demonstrate the function in a complete program that reads in an integer that is less than 3001 stores a list of all the prime numbers from 2 through that number in a file named "PrimeList.txt" and to the standard output. Screenshot: Title, Prompts, Output, Labels: Program will write output to the file and to the standard output.1. A program writes the following text to the standard output(Can bee seen in the top of the screen shot): CMSC 140 CRN Project 5: Prime Numbers2. After closing the file, the program writes to the standard output:a. on a line by itself : Prime numbers are written to PrimeList.txtb. a list of primes Input Validation If the value read in exceeds 3000, the program writes on a line by itself in standard output: Your input integer should be less than 3001. Try again.