# Why my reduce() function is not unable to find out correct maxGrade? Code Answer

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I’m trying to find out the correct Max grade from a given numbers list. So, when i use this `highAndLow("4 5 29 54 4 0 -214 542 -64 1 -3 6 -6")` the function gives me `6` as `maxGrade` but it should be `542`.

Please, check the code and explain the problem.

```function highAndLow(numbers) {
var num = numbers.split(" ");

var maxGrade = num.reduce((accum, currVal) => {
if (accum > currVal) return accum;
return currVal;

});
console.log(num);
}

highAndLow("4 5 29 54 4 0 -214 542 -64 1 -3 6 -6")```

When you use `split()` to convert the string to an array, you actually have an `array of strings`

You can use `Array.map(Number)` to convert strings into number

The string value `"6"` is greater than the string value `"542"`

```function highAndLow(numbers) {
var num = numbers.split(" ").map(Number);

var maxGrade = num.reduce((accum, currVal) => {
if (accum > currVal) return accum;
return currVal;
});