Write a function that determines if an array of numbers is a bitonic sequence.

isBitonic.js

const isBitonic = (arr) => {
    let peakNumber = 0;
    for (let i = 0; i < arr.length; i++) {
        if(arr[i] > peakNumber) {
            peakNumber = arr[i];
        }

        if(arr[i] === peakNumber && arr[i] > arr[i + 1]) {
            console.log('extra credit: ', peakNumber);
            return true
        }
    }
    console.log('extra credit: ', peakNumber);
    return false
}

isBitonic([1,2,3,2,5]);
isBitonic([1,2,3])
isBitonic([3,4,5,5,5,2,1,7])