Question

Javascript function that takes an array parameter and returns an array value. The assumption is that the array is an integer array. The returned array should be composed of the square of the elements in the array parameter for the corresponding position.

Answer 1

function sayHello(arr) //function taking array as parameter and returning array result
{result=[];//array to store result

//calculating square of each element and storing in the result array
for (i=0; i<arr.length; i++){
sqr=Math.pow(arr[i],2);
result.push(sqr);
}
return result; //returning result array
}
var x = [1,2,3]; //intializing x array
var y=sayHello(x); //calling function and passing array x

//printing resulting array in alert
for (i=0; i<y.length; i++){
alert(y[i]);
}

//Please let me know in case of any doubt,Thanks.