JS Function and its Types

santhoshkumar-io — Wed, 16 Nov 2022 16:26:11 +0000

Hi, Today I learned about function and its types in Javascript and thought of sharing it online.

Function Declaration

function textUp(){
  console.log("This is text up")
}
textUp(); //Function has been called
textUp(); //Function has been called

Function with Arguments

Functions are used to perform a single operation to multiple variables that can be passed as argument respectively.

//Functions with different arguments passed on

 function sum(a:any,b:any){
  console.log( "The Sum is" a + b)
}

sum(5,4); //sum function called with 5 and 4 arguments passed on where it returns 9
sum(25,11); //sum function called with 25 and 11 arguments passed on where it returns 36

Function Expression

The function can be defined with the name followed by const keyword as expression.

//Function Expression

const speak = function(){ 
  console.log("Have a good day")
}

Function with Return Values

The return value will be retrieved when the function is called.

//Should return the solution when the function is called
const multiply = function(){
    return "The solution is " +  a*b;
}

Arrow Function

The arrow function is the minimal form of the normal function and it makes the code cleaner.

//Function Expression
const calcArea = function (radius){
     return 3.15 * radius ** 2; //Returns the area
}
calArea(5);

//Arrow Function
const calcArea = (radius)=>{
     return 3.15 * radius ** 2;
}
calArea(5);//Returns the Area

Thanks for reading!

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