How Much is True?

Create a function which returns the number of true values there are in an array.

Examples

countTrue([true, false, false, true, false]) ➞ 2

countTrue([false, false, false, false]) ➞ 0

countTrue([]) ➞ 0

Notes

• Return 0 if given an empty array.
• All array items are of the type bool (true or false).