Understanding functions in JS by solving questions releated to it.

Question 1: Write a function to return vowel number form a given string.

Question 2: Write an arrow function to return vowel number form a given string.

Question 3: Find the sum of square of numbers of array using forEach loop.

Question 4: Collect the students marks more than 90 in an array.

Question 5: Find the sum and product using reduce method.

Check console for the outputs...