Day 3 of Javascript

Function

• Function is block of code with set of instruction.
• Once write the instruction and call it many times.
• Function is a resuability code design to perform a specific task.
• Function execute when they are called or invoked.

Syntax for function

function funname()
{
//set of instruction
}

Exaplanation:

• function is a keyword or reserve word.
• funname is a function name.we can give any name but it want to be understandable.
• ()->function bracket.Inside the bracket we give parameters(inputs).
• {}->inside write a set of instruction.

Example:
Without parameter

function sample()
{
   console.log("Hello");
}
sample() //function calling statement

with parameter

function add(a,b)
{
console.log(a+b);
}
add(10,20)

Type of :
typeof is operator it return the types of variable.
Example:
console.log(typeof(10))//number10