JAVASCRIPT

js create and call function

// Create a function (you decide the name) that logs out the number 42 
// to the console

// Call/invoke the function

 function number(){
     console.log(42)
 }
 
 number()
//result = 42

how to call a function in JavaScript

// calling our function
displayGreeting();

how to call a function javascript

//  we create a function by typing the keyword " function" + Function's name and ( we add the parameter here )
// {
//     the function body 
// }

// we call the function by typing it's name without the keyword and we add ()

function second (name){ 
    name = "Elmustafa";
    alert(name);
}

first();

javascript call

function myFunc(p1, p2, pN)
{
     // here "this" will equal "myThis"
}
let myThis = {};

// call myFunc using myThis as context.
// pass params to function arguments.
myFunc.call(myThis, "param1", "param2", "paramN");

JavaScript Function call()

const person = {
  firstName:"John",
  lastName: "Doe",
  fullName: function () {
    return this.firstName + " " + this.lastName;
  }
}

// This will return "John Doe":
person.fullName();  

javascript call example

l = "abcder";
q = "Ererwrwrewrew";
console.log(String.prototype.substr.call(q, 1, 4))
/*rerw...4 refers to how many characters to substring*/