JAVASCRIPT

A function with expression in js

// Expressions in js

// A simple function without any expression
function func() {
    console.log("Hello i am a function");
}

func();

// A fancy function in js with expression is like shown below
const func_2 = function () {
    console.log("Hello i am a function");
}

func_2();

javascript expression

0 // 0

1 + 1 // 2

'Hello' + ' ' + 'World' // 'Hello World'

{ answer: 42 } // { answer: 42 }

Object.assign({}, { answer: 42 }) // { answer: 42 }

answer !== 42 ? 42 : answer // 42

answer = 42 // 42

js function expression

const plantNeedsWater = function(day){
  if (day === 'Wednesday'){
    return true;
  } else{
    return false;
  }
}

console.log(plantNeedsWater('Tuesday'))

javascript function expression

const mul = function(x, y){
    return x * y;
}; //semicolon needs to be there as it is expression

console.log(mul(10, 20));

javascript expression

// EXPRESSION: Code that produces a value
// example(s):
3 + 4
1991
true && false && false

// STATEMENT: Code that performs actions (generally something that ends in ";"
// example:
const str = `String assigned to str`;

How to Define a Function using a Function Expression in javascript

let namedFunction = function myFunction(){
	//some code here...
}

expression javascript

5; // Baris kode ini merupakan expression karena interpreter akan membaca kode ini dan menghasilkan nilai 5.
2 + 3; // Baris kode ini juga merupakan expression. Interpreter mengevaluasi kode dan juga akan menghasilkan nilai 5.