assignment2.ts

// Develop a program that calculates and prints the sum of the first n even numbers using a for loop.
 let n : number=10;
let sum : number= 0;
function sumOfEven(n:number){
for (let i:number = 1; i <=n ;i++)
    {
            sum= sum+(i*2)
        
        }
    return sum
}
console.log(`If n= ${n} sun of first ${n} even numbers is =`+sumOfEven(n))

console.log("new program start");
console.log("");

//-- Implement a program that uses a for loop to iterate through an array of numbers and print only the even numbers.
let array2:number []= [2,3,4,6,5,9,10];
for (let i=0;i<array2.length; i++)
    {
        if (array2[i]%2===0)
        {console.log(array2[i])}
    }
    console.log("new program start");
    console.log("");
// - Implement a program that uses a loop to iterate through an array of numbers and remove all the even numbers from them and just leave the odd ones

let array11:number []= [8,2,3,4,6,5,9,10];
console.log("Array = ", array11)
for (let i=0;i<array11.length; i++)
    {
        if (array11[i]%2===0)
        {
            array11.splice(i,1)
            i--;
        }
    }
console.log("Array without even numbers= " ,array11)
console.log("new program start");
console.log("");
// - Write a program that defines a function to calculate the area of a circle. The function should take the radius as input and return the calculated area.
const pi:number= 3.14159;
let radius:number=5;
function areaOfCircle(n:number){
    let area:number= pi*(n*n);
return area.toFixed(2)
}
console.log(`Area of circle with radius ${radius} is`, areaOfCircle(radius))
console.log("new program start");
console.log("");
// - Develop a program that reads a list of grades and uses the splice method to remove failing grades (below 50) from the array.
let grades: number[]=[20,30,50,60,70,40];
console.log("Grades are ",grades)
for (let i=0;i<grades.length;i++)
    {
        if (grades [i]<50)
        {
            grades.splice(i,1);
            i--
        }
    }
console.log("Updated grades are ",grades) 
console.log("new program start");
console.log("");
//- Write a program that uses a function to find the largest element in an array of numbers.
let array12:number[]=[100,12,13,12,102];

function largestE(arr:number[]){
    let largestEle:number=0;
    for(let i=0;i<arr.length;i++){
    if(arr[i]>largestEle)
{largestEle=arr[i]}
}
return largestEle
}
console.log("Largest element is ",largestE(array12));