practicing python

Author: IntelliJinceTech

pythonExercises/7kyus/numberOfPplInTheBus.py

@@ -0,0 +1,22 @@
+    # input is a list of integer pairs
+    # in each pair in the list, 
+        # first number: number of ppl that get on the bus
+        # second number: number of people that get off the bus
+    # all numbers are positive. 
+    
+    # declare variable count
+    # iterate over list 
+    # first number of element is always added to count
+    # second number is always subtracted from count
+    # 
+    
+def number(bus_stops):
+    # count = 0
+    # for stop in bus_stops:
+    #     count += stop[0]
+    #     count-= stop[1]
+    
+    # return count
+    return sum([stop[0] - stop[1] for stop in bus_stops])
+
+print(number([[10,0],[3,5],[5,8]]),5)