Sum of Two Numbers in Array Equal to Given Number

Create a function that takes an array of numbers arr and a number n. Return true if the sum of any two elements is equal to the given number. Otherwise, return false.

Examples

checkSum([10, 12, 4, 7, 9, 11], 16) ➞ true

checkSum([4, 5, 6, 7, 8, 9], 13) ➞ true

checkSum([0, 98, 76, 23], 174) ➞ true

checkSum([0, 9, 7, 23, 19, 18, 17, 66], 39) ➞ false

checkSum([2, 8, 9, 12, 45, 78], 1) ➞ false

Notes

N/A