Create Planetary_Weights.py

Planetary_Weights.py

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+# Use constants
+MERCURY_GRAVITY = 0.376
+VENUS_GRAVITY = 0.889
+MARS_GRAVITY = 0.378
+JUPITER_GRAVITY = 2.36
+SATURN_GRAVITY = 1.081
+URANUS_GRAVITY = 0.815
+NEPTUNE_GRAVITY = 1.14
+
+def main():
+    # Prompt user to enter weight and store weight as well
+    earth_weight = float(input("Enter a weight on Earth: "))
+
+    # Prompt the user for a planet
+    planet = input("Enter a planet: ")
+    planet = planet.lower().capitalize()
+
+    # Ensure that the user enters a planet
+    while planet != "Mercury" and planet != "Venus" and planet != "Mars" and planet != "Jupiter" and planet != "Saturn" and planet != "Uranus" and planet != "Neptune":
+        if planet == "Earth":
+            print("Please select a planet other than Earth.")
+        else: 
+            print("Error: " + planet + " is not a planet.")
+
+        planet = input("Enter a planet: ").lower().capitalize()
+
+    # Calculate corresponding weight on the inputted planet
+    # Assume that the user entered a planet correctly
+    if planet == "Mercury":
+        planet_weight = earth_weight * MERCURY_GRAVITY
+
+    elif planet == "Venus":
+        planet_weight = earth_weight * VENUS_GRAVITY
+
+    elif planet == "Mars":
+        planet_weight = earth_weight * MARS_GRAVITY
+
+    elif planet == "Jupiter":
+        planet_weight = earth_weight * JUPITER_GRAVITY
+
+    elif planet == "Saturn":
+        planet_weight = earth_weight * SATURN_GRAVITY
+
+    elif planet == "Uranus":
+        planet_weight = earth_weight * URANUS_GRAVITY
+
+    else:
+        planet_weight = earth_weight * NEPTUNE_GRAVITY
+
+    # Round it two decimal places
+    planet_weight_rounded = round(planet_weight, 2)
+
+    # Print the output
+    print("The equivalent weight on " + planet + ": " + str(planet_weight_rounded))
+
+if __name__ == "__main__":
+    main()
+
+
+# Answer: Enter a weight on Earth: 3.15
+#         Enter a planet: mars
+#         The equivalent weight on Mars: 1.19
+
+
+#-----------------------------------------------------------------------------------------------------------------------------------------------------------------------
+
+
+# Planetary Weights Solution
+# There are two key parts to this solution:
+
+# 1. Everything from the first part of the problem: getting a user's input, converting it to a float to do the calculation, and covering it to a string to print it out.
+# 2. Using if statements to check which gravitational constant to use based on the user's input.