Create Mars_Weight.py

Mars_Weight.py

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+# Use constants
+MARS_MULTIPLE = 0.378
+
+def main():
+    earth_weight_str = input('Enter a weight on Earth: ')
+
+    # Get the numeric value since input() returns a value in string form
+    earth_weight = float(earth_weight_str)
+
+    # Having a variable for each piece of information is a good habit
+    mars_weight = earth_weight * MARS_MULTIPLE
+    rounded_mars_weight = round(mars_weight, 2)
+
+    # Note the string concatenation!
+    print('The equivalent weight on Mars: ' + str(rounded_mars_weight))
+
+if __name__ == '__main__':
+    main()
+
+
+#--------------------------------------------------------------------------------------------
+
+# Mars Weight Solution
+# There are three key stages to solving this problem:
+
+# 1. Getting the Earthling's weight from them, which I need the input function for. 
+
+# 2. Converting the Earthing's weight from a string to a number so I can do math with it. 
+# I use the float function to do this, since the weight isn't necessarily a whole number
+
+# 3. Calculating the weight on Mars, which I do by multiplying the Earth weight by 0.378. 
+# To make the program easy to read, I store this number in a constant called MARS_MULTIPLE.
+
+# Check out the solution code to see all of these stages in action.