This command will set the specified player variable to the specified value.
player.setav [character variable id] [value]
| Character Variable ID | The ID of the character variable you wish to set the value of. |
| Value | The value you wish to set the character variable to. |
player.setav experience 1500
This command would set the experience variable to 1500 (i.e. you'd have 1,500 experience after executing the command).
player.setav Intelligence 10
This command would set your intelligence variable to 10. Note that values over 10 for strength, perception, endurance, charisma, intelligence, agility and luck have an effect that is worse than 10 - meaning 10 is the best/highest value for these variables.