gistfile1.rb

def prime(n)
    k=2
    c=0
    
    if n==1
        print("false","\n")
    else
        while k<n-1
            b=n%k
            if b==0
                print("false:",k,"\n")
                c=c+1
            end
            
            if c==0
                print("true","\n")
            end
        end
    end
end