What is the use of Enumerable.Zip extension method in Linq?

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The Zip operator merges the corresponding elements of two sequences using a specified selector function.

var letters= new string[] { "A", "B", "C", "D", "E" };
var numbers= new int[] { 1, 2, 3 };
var q = letters.Zip(numbers, (l, n) => l + n.ToString());
foreach (var s in q)
    Console.WriteLine(s);

Ouput

A1
B2
C3

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