Weekly Fitness Tips, Part 1

Do carbs make you gain weight? Short answer: No, they don't, not on their own.
Carbs have 4 calories per gram. If you overeat, aka consume more calories, and they happen to be from carbs, then yes, you will gain weight. However, it's not the carbs that did it, it's the excess of calories.

More nuanced answer: Foods that are highly processed will mostly be high in sugar (processed carbs) & fat. That's why they taste so good, that high palatability can lead to overeating them. Those foods will likely also be high in calories but low in volume, making it very easy to overeat them & therefore leading to weight gain.
Keep in mind that it's not just junk food like sweets & chocolate that are high in carbohydrates, it's also a lot of whole foods like fruits, vegetables, grains & legumes. There's a difference in how your body processes a simple carb like refined sugar Vs how it processes a complex carb like a sweet potato. E.g., whole foods like potatoes & bananas give you longer-lasting energy, whereas processed sugar gives a short,r immediate burst of energy. Whole foods tend to be more filling & less calorie-dense. Making it harder to overeat them.