Merge pull request #628 from ROHITH1709-byte/patch-1

Update app.py

BMI Calculator (Flask)/app.py

@@ -1,27 +1,28 @@
 from flask import Flask, render_template, request
 
-# declare the app
+# Declare the app
 app = Flask(__name__)
 
-# start an app route
+# Start an app route
 @app.route("/")
 def main():
     return render_template("index.html")
 
-
-# route for bmi calculation result
-@app.route("/bmi", methods=["GET", "POST"])
+# Route for BMI calculation result
+@app.route("/bmi", methods=["POST"])
 def calculate():
     try:
         w = float(request.form.get("weight"))
         h = float(request.form.get("height"))
-        if w and h:
+        if w > 0 and h > 0:
             bmi = round(w / ((h / 100) ** 2), 3)
             return render_template("index.html", bmi=bmi)
-    except ValueError as error:
-        error = "Please enter all the values"
+        else:
+            error = "Weight and height must be positive numbers."
+            return render_template("index.html", error=error)
+    except ValueError:
+        error = "Please enter valid numeric values."
         return render_template("index.html", error=error)
 
-
 if __name__ == "__main__":
     app.run(debug=True)