Find Median of Values from Array in JavaScript

 let array_1 = [12, 8, 7, 90, 35, 98, 100, 25];
    let median;

        if(array_1.length %2 == 0){
             let array_index = (array_1.length/2);
             let new_array_index = (array_index - 1);
             median = ((array_1[array_index] + array_1[new_array_index])/2);
        }else{
             let array_index = ((array_1.length - 1)/2);
             median = array_1[array_index];
        }
    console.log(median);

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