I normally wouldn't make this kinda pedantic observation, but since you say you're "only 4 weeks into studies"...
The full description of why var is "problematic" is far longer than I care to type in this reply. But as you get further down your studies, it's a good thing to research.
Also, FWIW, the var keyword tends to cause headaches in other languages as well (e.g., C#).
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