Question : How to Auto Fill cells with a formula

I can't believe I've forgotten how to do this but I can't remember how to auto fill cells with a formula. Here's my set up:
I have an Excel sheet with First names in the A column and Last names in the B column. I need to append the last names to the first names so I use the formula =A1&" "&B1 this works great but I have 1000+ rows to do. I'm pretty sure I there is a way that I can auto fill the cells with the formula so that c1 has =A1&" "&B1 c2 has =A2&" "&B2 and so on. Thanks for any help.

Answer : How to Auto Fill cells with a formula

On the formula cell, hover your cursor over the bottim right corner until the cursor turns into crosshairs (+ sign). Once it does, click and drag it down tge column until you've reached your desired row.

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