for和forEach的险些IncreeasingSequence Code Signal javascript问题

Question

我通过在代码信号中处理不同的问题来挑战自己。在几乎增加的序列问题中，我对此进行了编码：

function almostIncreasingSequence(sequence) {
var count = 0;

sequence.forEach((element, i) => {
    if(sequence[i] <= sequence[i-1]){
        count++;
        if(sequence[i] <= sequence[i-2] && sequence[i+1] <= sequence[i-1]){
            return false;
        }
    }
});

return count <= 1;
};

14/17答案是正确的。但是，在寻找解决方案时，我发现使用普通的for循环执行此操作是可行的，而且我不知道为什么

function almostIncreasingSequence(sequence) {
    var count = 0;

    for(i=0; i < sequence.length; i++){
        if(sequence[i] <= sequence[i-1]){
            count++;
            if(sequence[i] <= sequence[i-2] && sequence[i+1] <= sequence[i-1]){
                return false;
            }
        }
    }

    return count <= 1;
};