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82 lines (39 loc) · 2.98 KB
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// ===============================================>console.log<===================
// console.log kisi b data ko console me show krta he
// console.log("hello world");
// console.log("my name is sameer");
// console.log("and i am learning javascript");
// ==============================<Data types in javascript>==========================================
// javascript me mukhtalif data types hoti he jese k strings, number, booleans wgera wgera
// for example:
// Strings:== strings ik data type he jo k just like simple text hota he lekin strings k under ager hum number ya koi or data type likhengey to wo b string bn jaega
// string ko lihkney k liye double quote "" ya single quote '' use hota he is quote k under k data type ko string kehtey hen
// number:========
// number simple kisi b number ko kehtey hen for example 1,3,4,5,6,7,8,
// converting string into number
// kisi bhi string ko number me convert krney k 3 takreeekey hen
// 1=======string k start me + likhney se wo number me convert hojata he for example
// "4" ye ik string he lekin is k start me + lganey se ye number me convert hojaega +"4"
// 2============string k start me number likhney se wo number me convert hojaega
// "4" ye ik string he lekin is k start me number() lganey se ye number me convert hojaega number("4")
// =======================>varraibales<==========================
// varriables k under hum koi b value store krtey hen or usko koi name provide krtey hen for example
// mera name sameer he to hum name k under sameer ko store krdengey like just like thhis below
// var name = "sameer";
// console.log(name);
// var age = 21;
// console.log(age);
// =============================================>Comment<========================================
// browser ko kisi bhi chez ko ignore krwaney k liye hum coment use krtey hen, for example agr humeny koi bhi code browser me show ya run nai krwana hota he to hum usey comment krtey he is k liye hum ye do bar slash // use krtey hen
// ===================================================>operators<=================================
// operator use hotey hen kisi b value ko assign krney k liye, compare krney k liye or koi b arthmetc operation krney k liye just like plus+ minus- multiply * ya divide/ wgera wgera
// var foodAmount = 10;
// var tipPercentage = 0.3;
// var tipAmount = foodAmount * tipPercentage
// console.log(tipAmount);
// =======================================<prompt>===========================================
// prompt user se koi b value ya data hasil krney k liye use krtey hen. prompt jb b use krtey hen to browser me ik popup show hita he jo user se koi b value or data mangta he
// prompt("what is your name?")
// ===================================<alert>============================================
// alert ik bhi prompt ki trah browser me popup show krta he lekin alert user se koi b data ya value nai mangta alert sirf user ko koi bhi information btaney k liye use hota he for example
// alert("you are successfully loged in")