Can function name and variable name be same in JavaScript?

Variables and functions share the same namespace in JavaScript, so they override each other. if function name and variable name are same then JS Engine ignores the variable. With var a you create a new variable. The declaration is actually hoisted to the start of the current scope (before the function definition).

Can you assign a function to a variable in JavaScript?

It is possible to use a function expression and assign it to a regular variable, e.g. const factorial = function(n) {…} . But the function declaration function factorial(n) is compact (no need for const and = ). An important property of the function declaration is its hoisting mechanism.

How do you name variables and functions in JavaScript?

Naming Conventions

  1. Variable and function names written as camelCase.
  2. Global variables written in UPPERCASE (We don’t, but it’s quite common)
  3. Constants (like PI) written in UPPERCASE.

Can variable name and function name be same?

You cant because if you have example(), ‘example’ is a pointer to that function. This is the right answer. There are function pointers, which are variables. But also, all function names are treated as const function pointers!

Can function name and variable name be same in Java?

Yes it’s fine, mainly because, syntactically , they’re used differently.

How do you update a variable?

One of the most common forms of multiple assignment is an update, where the new value of the variable depends on the old. This means “get the current value of x , add one, and then update x with the new value.” Updating a variable by adding 1 is called an increment; subtracting 1 is called a decrement.

How do you call a function stored in a variable in JavaScript?

There are two methods to call a function from string stored in a variable. The first one is by using the window object method and the second one is by using eval() method. The eval() method is older and it is deprecated.

Can a variable be a function?

“A variable is a named entity that refers to an object. A variable is either a val or a var . Both vals and vars must be initialized when defined, but only vars can be later reassigned to refer to a different object.”

Can function name and variable name be same?

How do you name variables and functions?

When naming a function, variable or class, you should keep the following things in mind:

  1. Choose a word with meaning (provide some context)
  2. Avoid generic names (like tmp )
  3. Attach additional information to a name (use suffix or prefix)
  4. Don’t make your names too long or too short.
  5. Use consistent formatting.