.concat() method

 1) function of .concat() method

a) Return a new Array (merged)

b) Doesn't change the existing array

// .concat() method returns a new Array(Merged)

// Doesn't change the existing Array

// 0 1 2 3 4

const a = ['a', 'b', 'c', '10', 'd'];

const b = ['10', '20', '30'];

const newArray1 = a.concat(b);

const newArray2 = b.concat(a);

console.log(newArray1);

console.log(newArray2);

console.log(a); // this will remain as it is.

console.log(b); // this will remain as it is too.

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