Add exercise assignment for Array creation

Author: mlouhivu

numpy/array-creation/README.md

@@ -0,0 +1,11 @@
+## Array creation
+
+Start from a Python list containing both integers and floating point values,
+and construct then a NumPy array from the list.
+
+Generate a 1D NumPy array containing all numbers from -2.0 to 2.0 with a
+spacing of 0.2. Use optional start and step arguments of the `np.arange()`
+function.
+
+Generate another 1D NumPy array containing 11 equally spaced values between
+0.5 and 1.5. Extract every second element of the array.