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If you run rvm use 2.6.3 but get an error saying the version is not installed, what is the likely cause?

medium📝 Predict Output Q5 of 15
Ruby - Ecosystem and Best Practices
If you run rvm use 2.6.3 but get an error saying the version is not installed, what is the likely cause?
AYou need to run <code>rvm install 2.6.3</code> first
BRuby 2.6.3 is not installed via rvm
CThe command syntax is incorrect
DRuby 2.6.3 is deprecated and cannot be used
Step-by-Step Solution
Solution:

  1. Step 1: Understand rvm use behavior

    This command switches to a Ruby version only if it is already installed.

  2. Step 2: Identify the cause of the error

    If the version is missing, you must install it first using rvm install <version>.

  3. Final Answer:

    You need to run rvm install 2.6.3 first -> Option A

  4. Quick Check:

    Switching Ruby requires prior installation [OK]
Quick Trick: Always install Ruby version before using it with rvm [OK]
Common Mistakes:
  • Assuming rvm use installs Ruby automatically
  • Thinking the syntax is wrong when it is correct
  • Believing deprecated versions cannot be installed

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