What is the difference between `let` and `var` in swift?

Question

What is the difference between let and var in Apple\'s Swift language?

In my understanding, it is a compiled language but it does not check

Answer 1

var is variable which can been changed as many times you want and whenever

for example

var changeit:Int=1
changeit=2
 //changeit has changed to 2 

---

let is constant which cannot been changed

for example

let changeit:Int=1
changeit=2
 //Error becuase constant cannot be changed