The length of environment variables is the total number of all environment variables present. In other words, this is the count of all environment variables. We can use the length
property to get this number.
ENV.length
The value returned is an integer that represents the number of environment variables present.
# Getting the length of default variablesputs "#{ENV.length}" # 6# Clearing all environment variablesENV.clear# Getting the length of current variablesputs "#{ENV.length}" # 0# Creating some environment variablesENV["secret_name"] = "secret"ENV["secret_token"] = "secret"ENV["private_key"] = "code_sync_456"ENV["foo"] = "123"ENV["bar"] = "123"# Reprinting the length of environment variablesputs "#{ENV.length}" # 5
clear
method.