Task 5.2.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Task 5.2</title>
</head>
<body>
    <h2> Arrow function </h2>
    <script>

// // A. print odd numbers in an array
 let odd =(numbers)=>
{
    for (let i=1; i<10; i++)
    {
        if(i%2 != 0)
        {
        console.log(i)
        }
    
    }
}

 let numbers=[1,2,3,4,5,6,7,8,9,10];
 (odd(numbers));

//  B. Title cap all the string in an array  

  let arr = ["this is a javascript","title cap","string array"];

  let titlecapArray = arr.map(stringArr =>
{

  let strArr = stringArr.toLowerCase();
  let splitArr = strArr.split(' ');
  let titleCap = splitArr.map(word => {
    return (word.charAt(0).toUpperCase() + word.slice(1));
  });
  return titleCap.join(' ');

})
console.log(titlecapArray);


// // C. sum of all numbers in an array
let sum = (num)=>
{
    let sum=0;
    for (let i=0; i<=10; i++)
    {
        sum=sum + i;
        console.log(i,sum);
    }
      return sum

}
let num = [1,2,3,4,5,6,7,8,9,10];
console.log(sum(num));

// // D. Return all prime numbers in an array

let arr1 = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15];

        let isPrimeNumber = num =>{
        for(let i=2; i<num; i++)
        {
            if(num % i === 0)
            {
                return false;
            }
        }
        return true;
        }
    
     let primeNumber = arr1.filter(isPrimeNumber);
     console.log(primeNumber);

// E. Return all the palindrome in an array

let arr2 = ["Malayalam", 12121, "level", 2222, "Hello", 2341, "Madam"];

let isPalindrome =(arr)=>
{

let palindrome = [];
for(let i=0; i<arr.length; i++){
    let str = arr[i].toString().toLowerCase();
    let reversed = str.split('').reverse().join('');

    if(str === reversed){
        palindrome.push(arr[i]);
    }
}

console.log(palindrome);
} 
 isPalindrome(arr2);

  
    </script>
</body>
</html>