diff --git a/data_structures/arrays/sort_squares_of_an_array.rb b/data_structures/arrays/sort_squares_of_an_array.rb
new file mode 100644
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+++ b/data_structures/arrays/sort_squares_of_an_array.rb
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+# Arrays - Sorted Squares
+
+# Algorithm challenge description:
+# Given an integer array nums sorted in non-decreasing order
+# return an array of the squares of each number sorted in non-decreasing order.
+# Input: [4, -1, -9, 2]
+# Output: [1, 4, 16, 81]
+
+# Loop and multiply
+
+array = [4, -1, -9, 2]
+
+def square_and_sort(array)
+  result_array = []
+
+  array.each do |num|
+    result_array.push(num*num)
+  end
+
+  result_array.sort
+end
+
+print square_and_sort(array)
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