Ruby program to check whether the given number is prime or not
Checking prime number What is Prime number? Prime numbers are those numbers which can only be divisible by itself or 1 puts "Enter the number:" Output Enter the number: Enter the number:
num=gets.chomp.to_i
count=0
if (num==0)
puts "0 is not prime"
else
i=2
while(i<num)
if (num%i==0)
count+=1
end
i+=1
end
end
if count>1
puts "#{num} is not a prime number"
else
puts "#{num} is a prime number"
end
2
2 is a prime number
11
11 is a prime number