arrayMaximalAdjacentDifference.cs

int arrayMaximalAdjacentDifference(int[] inputArray) {
    var major = 0;
    
    for (int i = 0; i < inputArray.Length; i++) {
        var previous = i - 1;
        var next = i + 1;
        if (previous < 0 || next > inputArray.Length -1) continue;
        
        var current = inputArray[i];
        var preval = inputArray[previous];
        var nextval = inputArray[next];
        
        int t1 = 0;
        if (current >= preval) {
            t1 = current - preval;
        } else {
            t1 = preval - current;
        }
        if (t1 >= major) major = t1;
        
        if (current >= nextval) {
            t1 = current - nextval;
        } else {
            t1 = nextval - current;
        }
        if (t1 >= major) major = t1;
    }
    
    return major;
}