Challenge #79: Find the Closest Prime Number

[AliMc7]

Really wanted to try solving this with an iterative macro, as part of prep for taking the Advanced cert this week. Got there in the end, but not very happy about needing 2 macros - one to look for the closest Prime down from the input # and one for the closest Prime up. Think this could be a lot more elegant, but it does work at least. Thanks!

Spoiler

Solution


Iterate down


Iterate up

[cmoussa]

[martinson]

Used an iterative

[trizi]

Probably not the easiest way, but I'm kind of proud of this :))

[ntakeda]

I solved in Japanese Weekly.

[barrymoe]

Got it!

Great test

[JBevan89]

Great Challenge

[RebekaMazuchova]

It took me some time and maybe it's not the most effective approach, but it gets the work done, and that's what I was going for!

[mattnason1]

Had to put my thinking cap on.

Spoiler

[alexnajm]

I would not have guessed the square root logic, so thank you to those who helped!

Spoiler