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3. Prime numbers can be generated by an algorithm known as the Sieve of Eratosthenes. The algorithm for this procedure is presented here. Write a
3. Prime numbers can be generated by an algorithm known as the Sieve of Eratosthenes. The algorithm for this procedure is presented here. Write a program called primes.js that implements this algorithm. Have the program find and display all the prime numbers up to n 150 Sieve of Eratosthenes Algorithm To Display All Prime Numbers Between 1 and n Step 1: We need to start with all the numbers representing the range of numbers that are possible candidate primes. So, create an array of consecutive integers from 2 to n: (2,3,4,..n). I wouldn't hand-code this. I would use a loop to populate the array Step 2: At each step we select the smallest number and remove all it's multiples. So we'll start with an outer loop that goes from 2 to n. initially, let p equal 2, the first prime number Step 3: In an inner loop we need to iterate over all the numbers that are multiples of p, i.e for 2, that's 2,4,6,8 etc. Each time, setting it's value to false in the original array Step 4: Find the first number greater than p in the list that is not marked False. If there was no such number, stop. Otherwise, let p now equal this number( which is the next prime), and repeat from step 3 When the algorithm terminates, all the numbers in the list that are not marked False are prime Example: Let us take an example when n = 50. So we need to print all print numbers smaller than or equal to 50 We create list of all numbers from to 50 10 18 19 20 282930 37383940 1 42 43 44 45 46 47 48 4950 12 13 14 15 16 17 21 22 23 24 25 26 27 31 32 33 34 35 36
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