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vadimkorr/Amount of even numbers in range.js

Created January 28, 2018 12:23
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Amount of even numbers in range
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Amount of even numbers in range.js
// Find amount of even numbers X in range: A <= X <= B
let find = (a, b) => {
return Math.floor((b - a) / 2) + (a%2==0 || b%2==0 ? 1 : 0)
}
console.log(find(1, 5)) // 2
console.log(find(1, 4)) // 2
console.log(find(2, 5)) // 2
console.log(find(2, 4)) // 2
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