feat(examples): conditions

Author: ashegde

codes/session_2/condition.py

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+# Open terminal > python3 condition.py
+# Start typing below commands and see the output
+
+x = int(input('Please enter an integer: '))
+
+if x < 0:
+  print(str(x) + ' is a negative number')
+elif x == 0:
+  print(str(x) + ' is zero')
+else:
+  print(str(x) + ' is a positive number')