Casadi is a computer software program that helps people do math and solve problems. It's like a big bag of tools for people who want to solve really complicated math problems.
Imagine you have a tricky math problem to solve, like figuring out how fast a rocket can go. Casadi helps you by doing a bunch of complicated calculations for you, so you don't have to do it all yourself.
Basically, Casadi lets you write your math problem down in a way that a computer can understand, and then it crunches the numbers really quickly to give you an answer. It's like having a really smart friend who's really good at math, but faster and more accurate.
People who work in math, engineering, or science use Casadi all the time because it saves them a lot of time and effort. They don't have to do all the calculations themselves, which can take a really long time. Instead, they can focus on understanding the results and using them to solve bigger problems.
Overall, Casadi makes math easier and more manageable for people who need to solve complex problems.