JAVASCRIPT #2 (STRINGS)

// STRING CONTINUE......

let age = 22;

let firstName = "harshit";

console.log(typeof age);

// number to string convert...

age = age + "";

console.log(typeof age );

// strings to number convert...

let myStr = "34";

myStr = +"34";

console.log(typeof myStr);

//another method....

//to convert number to string...

let aGe = 18;

aGe = String(aGe);

console.log(typeof aGe);

//to convert string to number...

aGe = Number(aGe);

console.log(typeof aGe);

// string concatenation...

let string1 = "kangkana";

let string2 = "kalita";

let fullName = string1 + " " + string2;

console.log(fullName);

let str1 = "18";

let str2 = "20";

let newStr = +"18" + +"20";

console.log(newStr);

// template string

let old = 22;

let firstname = "kangkana";

// "my name is kangkana and my age is 20"

let aboutMe = "my name is " + firstname + "and my age is " + old;

console.log(aboutMe);

aboutMe = `my name is ${firstname} and my age is ${old}`;

console.log(aboutMe);

// undefined

//null

let lastName;

console.log(typeof lastName);

lastName = "kalita";

console.log(typeof lastName, lastName);

let myVariable = null;

console.log(myVariable);

myVariable = "kangkana";

console.log(myVariable, typeof myVariable);

console.log(typeof null);

// object is bug, error

//BigInt

let myNumber = 123;

console.log(Number.MAX_SAFE_INTEGER);// js say about what limit i can set numbers.

//way to set BigInt

//BigInt can not operate with other type...

myNumber = BigInt(12);

let sameMyNumber = 123n;

console.log(myNumber + sameMyNumber); 

Output: