I don't know what to eat to gain weight and build muscle.

read the sticky

>>42850734
I have but i'm still confused

Sl5x5 and gomad.

It's a bit of a meme but it's the best structured routine for beginners. It will show you the ropes and get you going. Gomad will pile on the pounds for you while you lift

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>>42850700
Food: Eggs, Oats, Beans, Chicken breast, pork loin, nonfat greek yogurt, whey powder.

Calorie count: Custommealplanner.com (eat around 2000 calories, and make sure to get 1 gram of protein for every pound of weight you have. Also, avoid processed foods and simple carbs like bread and potatoes and pasta)

Lifts: Curl: 3x10, Bench 3x10, OHP 3x10, Incline bench 3x10, Push ups, 3x10, Dips 3x10, pull ups, 3x10, etc

Core: Weighted curl ups 3x40, leg raises 3xhowever many you can do, ab wheel, etc

Cardio: 30 minutes a day minimum, run, bike, exercycle, swim, etc

Hope this helps a little, but I've only been lifting for 6 months so take this with a grain of salt.

>>42850739
eat protein and a surplus of calories to gain weight and muscle. some nice protein rich foods:
>greek yogurt
>chicken
>steak
>burger
>fish
to start lifting, pick a beginners routine and google/youtube form for the lifts you're not sure on