Summary. In short, use function declarations when you want to create a function on the global scope and make it available throughout your code. Use function expressions to limit where the function is available, keep your global scope light, and maintain clean syntax.What does this function definition mean?
A function is defined as a relation between a set of inputs having one output each. In simple words, a function is a relationship between inputs where each input is related to exactly one output. Every function has a domain and codomain or range. A function is generally denoted by f (x) where x is the input.What is the difference between functor and function?
Functor is a related term of function. In context|computing|lang=en terms the difference between functor and function is that functor is (computing) a function object while function is (computing) a routine that receives zero or more arguments and may return a result. In context|mathematics|lang=en terms the difference between functor and function