Ruby Integer prime? function with example
Last Updated :
03 Dec, 2020
The prime? function in Ruby returns a boolean value. It returns true if the number is prime, else it returns false. It requires the ‘prime’ class to be pre-added.
Syntax: number.prime?
Parameter: The function takes the integer which is to be checked for prime or not.
Return Value: The function returns a boolean value which determines if the value is prime or not.
Example 1:
Ruby
require 'prime'
num1 = 100
num2 = 17
num3 = 90
num4 = 29
puts num1.prime?
puts num2.prime?
puts num3.prime?
puts num4.prime?
|
Output:
false
true
false
true
Example 2:
Ruby
require 'prime'
num1 = 13
num2 = 19
num3 = 18
num4 = 10
puts num1.prime?
puts num2.prime?
puts num3.prime?
puts num4.prime?
|
Output:
true
true
false
false
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