public/subjects/cut-corners

Cut Corners

Instructions

Create some functions which behave like JavaScript's Math rounding functions:

• round: which behaves similar to Math.round().
• ceil: which behaves similar to Math.ceil().
• floor: which behaves similar to Math.floor().
• trunc: which behaves similar to Math.trunc().

Some restrictions apply:

• You may not use strings conversion to do it
• No bitwise operator
• No % operator

Usage

const nums = [3.7, -3.7, 3.1, -3.1]
console.log(nums.map(round))
console.log(nums.map(floor))
console.log(nums.map(trunc))
console.log(nums.map(ceil))

Output:

[ 4, -4, 3, -3 ]
[ 3, -4, 3, -4 ]
[ 3, -3, 3, -3 ]
[ 4, -3, 4, -3 ]

Notions

• Math

Code provided

The provided code will be added to your solution, and does not need to be submitted.

Math.round = Math.ceil = Math.floor = Math.trunc = undefined