Return the maximum value of all items in {expr}. Example: echo max([apples, pears, oranges]) {expr} can be a |List| or a |Dictionary|. For a Dictionary, it returns the maximum of all values in the Dictionary. If {expr} is neither a List nor a Dictionary, or one of the items in {expr} cannot be used as a Number this results in an error. An empty |List| or |Dictionary| results in zero. Can also be used as a |method|: mylist->max()