Ruby Integer prime? function with example

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.even?

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:

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# Ruby program for prime? function
   
# Pre-defined class
require 'prime'
   
# Initializing the numbers 
num1 = 100
num2 = 17
num3 = 90
num4 = 29
      
# Printing if prime or not 
puts num1.prime?
puts num2.prime?
puts num3.prime?
puts num4.prime?

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Output:

false
true
false
true

Example 2:

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# Ruby program for prime? function
   
# Pre-defined class
require 'prime'
   
# Initializing the numbers 
num1 = 13
num2 = 19
num3 = 18
num4 = 10
     
# Printing if prime or not 
puts num1.prime?
puts num2.prime?
puts num3.prime?
puts num4.prime?

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Output:

true
true
false
false


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