Create a function in JavaScript called "sum" that takes in an array as a parameter and...
Create a function in JavaScript called "sum" that takes in an array as a parameter and returns the sum of all of the EVEN numbers in a given array. Please note: the array passed in can have any data type, i.e. Strings, Numbers, Booleans, undefined, etc.
HINT: the expression typeof will help discern var types. For example if I have: var x = 4, and I do typeof(x) - the output would be "Number"
Example run:
sum([1, 4, 8, 10, 'q', true]) //output would be 22
sum([3 , 5, 7, true, false, 'po']) //output would be 0
Homework Answers
- We are using an array to enter inputs
- We are passing the array to sum function
- Comparing each element with it's data type
- If it is number then checking for even number
- If it is even then adding and returning total to output
==================== Start Program ====================
<!DOCTYPE html>
<html>
<body>
<script>
myArray = [1, 4, 8, 10, 'q', true]; //array to accept input
//myArray = [3 , 5, 7, true, false, 'po'];
var total = 0; //adding elements one by one
var result = sum(myArray); //calling sum function with array as
parameter
document.write("Sum of Even Numbers: "+result); //printing the result
function sum(myArray) { //sum function
for(var i=0;i<myArray.length;i++){
if(typeof myArray[i] === 'number'){ //checking for
number data type
if(myArray[i]%2==0){ //checking for even numbers
total = total + myArray[i]; //adding even
numbers
}
}
}
return total; //returning result to function call
}
</script>
</body>
</html>
==================== End Program ====================
Output: Sum of Even Numbers: 22
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