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This article explains about multiple examples how to generate random number.
How to Generate Random Number in Ruby?
rand method in used to generate the random number.
rand() without argument always returns the random number between 0.0 and 1.0. rand() - returns .5 value
puts rand() # return random number between 0.0 to 1.0
Here is an example
It takes individual number or start and ending index to generate number.
puts rand(10) # return random number between 0 to 9
puts rand(1 .. 20) # return random number between 1 to 20
How to generate Random String in Ruby?
Random String is unique characters groups that does not repeat for every execution.
SecureRandom class contains methods for generation of strings.
It contains below methods
- hex
- random_bytes
- base64
- random_number
- urlsafe_base64
Here is an code examples
require 'securerandom'
# Generate random hexa string
puts SecureRandom.hex
# Generate random string in base64 string with given length
puts SecureRandom.base64(4)
puts SecureRandom.base64(16)
# Generate random bytes
puts SecureRandom.random_bytes
# Generate random floating number between 0 and 1
puts SecureRandom.random_number
# Generate random urlsafe base64 string
puts SecureRandom.urlsafe_base64(4)
# Generate random alphanumeric string
puts SecureRandom.alphanumeric(20)
Output:
b5b4c1744374fba5c699d4f4033698a5
E+I/ig==
ShofUxlYH6AjRna0HSs/RQ==
����x$�t
�ğ�
0.5543919005899334
5BeL0Q
i6BjtXocvGFJHr48zGV7
