grouping by dividing array into different arrays

i have array like this.This array has 100 elements and I want to split this array into different arrays with 20 elements.

const array=[];
for (let i = 0; i < 100; i++) {
 array[i]=i;
}

I want to split this array into different arrays with 20 elements each. The arrays will be as follows =

array0=[0.. to 20]

array1=[1.. to 21]

array2=[2.. to 22] .

.

.

array80=[80..to 100]

How can I best solve this problem?
The reason why I separate the arrays this way is because I will be comparing them to each other at the end.