This command adds the "needed" amount of experience to your current experience level (i.e. leveling you up).
The syntax for the addlevel command is as follows:
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Find below working examples of the addlevel command.
This is the only way to use the addlevel console command. If you required 1000 experience to level up to the next level, this command would add 1000 experience to your existing experience, causing you to level up.