# About this series

This is series of daily JavaScript coding challenges... for both beginners and advanced users.

Each day I’m gone present you a very simple coding challenge, together with the solution. The solution is intentionally written in a didactic way using classic JavaScript syntax in order to be accessible to coders of all levels.

Solutions are designed with increase level of complexity.

## Today’s coding challenge

```
Print the distance between the first 100 prime numbers
```

(scroll down for solution)

## Code newbies

If you are a code newbie, try to work on the solution on your own. After you finish it, or if you need help, please consult the provided solution.

## Advanced developers

Please provide alternative solutions in the comments below.

You can solve it using functional concepts or solve it using a different algorithm... or just solve it using the latest ES innovations.

By providing a new solution you can show code newbies different ways to solve the same problem.

## Solution

```
// Solution for challenge29
printDistances(100);
// Print distances between the first n prime numbers
function printDistances(n)
{
var lastPrime = 2;
var i = lastPrime + 1;
var foundPrimes = 1;
while(foundPrimes < n)
{
if (isPrime(i))
{
println(i - lastPrime, "\t", i, " - ", lastPrime);
foundPrimes++;
lastPrime = i;
}
i++;
}
}
// Returns true if number n is prime
function isPrime(n)
{
if (n < 2)
return false;
if (n == 2)
return true;
var maxDiv = Math.sqrt(n);
for(var i = 2; i <= maxDiv; i++)
{
if (n % i === 0)
{
return false;
}
}
return true;
}
```

To quickly verify this solution, copy the code above in this coding editor and press "Run".

Note: The solution was originally designed for codeguppy.com environment, and therefore is making use of

`println`

. This is the almost equivalent of`console.log`

in other environments. Please feel free to use your preferred coding playground / environment when implementing your solution.

## Discussion