Add my solution for Arrays chapter

Author: KeeratKG

data_structures/2_Arrays/my-solution.py

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+# Question 1
+list = {'January': 2200, 'February': 2350, 'March': 2600, 'April': 2130, 'May': 2190}
+
+# 1. In Feb, how many dollars you spent extra compare to January?
+print(list['February']-list['January'])
+# 2. Find out your total expense in first quarter (first three months) of the year.
+print(list['January']+list['February']+list['March'])
+# 3. Find out if you spent exactly 2000 dollars in any month
+for i in list:
+    if list[i] == 2000:
+        print(i)
+else: print('No such month')
+# 4. June month just finished and your expense is 1980 dollar. Add this item to our monthly expense list
+list['June'] = 1980
+print(list)
+# 5. You returned an item that you bought in a month of April and got a refund of 200$. Make a correction to your monthly expense list
+# based on this
+list['April'] = list['April'] - 200
+print(list['April'])
+
+# Question 2
+heros=['spider man','thor','hulk','iron man','captain america']
+
+#     1. Length of the list
+print(len(heros))
+#     2. Add 'black panther' at the end of this list
+heros.append('black panther')
+print(heros)
+#     3. You realize that you need to add 'black panther' after 'hulk',
+#        so remove it from the list first and then add it after 'hulk'
+heros.remove('black panther')
+heros.insert(3,'black panther')
+print(heros)
+# 4. Now you don't like thor and hulk because they get angry easily :)
+# So you want to remove thor and hulk from list and replace them with doctor strange (because he is cool).
+# Do that with one line of code.
+heros[1:3] = ['doctor strange']
+print(heros)
+#    5. Sort the heros list in alphabetical order
+heros.sort()
+print(heros)
+
+# Question 3