javascriptproject/notes at main · Adilrasheed1/javascriptproject · GitHub

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// console.log("first program");
console.log("easy or tough");
let a=45;
let b=2;
//if-else
/*
if(a%2==0){
    console.log(a ,"is even");
}
else{
    console.log(a," is odd");
}*/
//ternary operator
//  c=a>18?"adult":"not adult";
//  console.log(c);
// let x=prompt("enter score ");
// if(x>=90 && x<=100){
//     console.log( "Grade:A");
// }
// else if(x>=70 && x<=89){
//     console.log("Grade:B");
// }
// else if(x>60 && x<=69){
//     console.log("Grade:C");
// }
// else if(x>50 && x<=59){
//     console.log("Grade:D");
// }
// else{
//     console.log("Grade:F");
// }
//loops in js
// console.log("multiples of 2 are:");
// for(let i=1;i<=10;i++){
//     console.log(2*i);
// }
//sum of 1 to n using for loop
// let sum=0;
// let n=prompt("enter the number");
// for(let i=1;i<=n;i++){
//     sum=sum+i;

// }
// console.log(sum);
//print all even numbers from 0 to 100
// console.log("the even numbers from 0 to 100 are")
// for(let i=0;i<=100;i++){
//     if(i%2==0){
//         console.log(i);
//     }
// }
// game guessing number
// let gameNumber=30;
// let guessGameNumber=prompt("guess the number:");
// while(gameNumber!=guessGameNumber){
//     guessGameNumber=prompt("you entered wrong number ,guess again:");
// }
// if(gameNumber==guessGameNumber){
//     console.log("you won");
// }
//practice question
// let fullName=prompt("enter your full name");
// let username="@"+fullName+fullName.length;
// console.log(username);
// //arrays
// let item=[94,97,94,92,90];

// for(let i=0;i<item.length;i++){
//     item[i]=item[i]-item[i]/10;
// }
// console.log(item);
//practice question
// let companies=["microsoft","amazon","apple","netflix","google"];
// companies.shift();
// companies.push("ibm");
// companies.splice(0,1,"facebook");
// console.log(companies);

//functions
// function strings(msg){
//     return msg.length;
// }
// console.log(strings("hellomynameisadilrasheed"));
//arrow functions
// const arrowstr=(msg)=>{
//     return msg.length;
// }
// console.log(arrowstr("helloworld"));
// count vovewls in string
// function countvowels(str){
//     let count=0;
//     for(let char of str){
//         if(char==='a' || char==='e' || char==='i' || char==='o' || char==='u'){
//             count++;
//         }
//     } return count;
// }
//  console.log(countvowels("adilrasheed"));
//for each loop
//  let arr=[90,97,89,94,78,92];
// let newArr=arr.filter((val)=>{
//     return val>=90;
// }
// )
// console.log(newArr);
//---------------
// let n=prompt("enter the number:");
// let arr=[];
// for(let i=1;i<=n;i++){
//     arr[i-1]=i;
// }
// console.log(arr);
// const output=arr.reduce((pre,current)=>{
//     return pre*current;
// })
// console.log(output)
 //document object model
 /*
 //togggle button
let btn=document.querySelector("#btn");
let currentMode="light";
btn.addEventListener("click",()=>{
    if(currentMode==="light"){
        currentMode="dark";
        document.querySelector("body").classList.add("dark");
    }
    else{
        currentMode="light";
        document.querySelector("body").classList.add("light");
    }
})*/
//events in javascript