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rahatarmanahmed/isPrime.coffee

Created December 12, 2013 00:11
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isPrime function in coffeescript
Raw
isPrime.coffee
isPrime = (n) ->
return false if n isnt ~~n or n <= 1 or n % 2 is 0 and n isnt 2
return false for r in [3..Math.ceil(Math.sqrt(n))] by 2 when n % r is 0
return true
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