Find the maximum difference of positive arrays

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Find the maximum difference of the following positive arrays,

Example: [1,2,4,55,223];

Idea: find the maximum and minimum

The methods Math.max (), Math.min (), max and min can only handle numbers, not arrays and strings;

　　... structural assignment

let a=[1,2,4,55,223];
       let max=Math.max(...a);
       let min=Math.min(...a)
       console.log(max-min);//222