Nested if statements

What if i want to check further conditions inside conditions?

For example i want to check for a condition if the weather is bad. In case this is false i decide to go out with my t-shirt.

What if this is true? Then i need to check further if we are talking about rain (so i would take an umbrella, or if it snows , then i will go skiing!).

It is also possible to implement if statements that are lying inside other if statements. As the picture shows above, first i check if i have enough money to buy a single room to spend the night. If this is true, then and ONLY then i can explore further and check if i have 100$ more than the cheapest room. In such case, i can go possibly to a better hotel, or for example upgrade for a better room. If not, then probably i will take the cheapest room. 

All this upgrade plan will happen ONLY if i have enough money to take the cheapest room, then i can ask further to make myself more comfortable etc. But if i don't have the money even for that, then i will have to keep looking elsewhere.