update BMI code

Author: Alaa-Tagi

Sprint-2/3-mandatory-implement/1-bmi.js

@@ -15,5 +15,8 @@
 // It should return their Body Mass Index to 1 decimal place
 
 function calculateBMI(weight, height) {
-    // return the BMI of someone based off their weight and height
-}
+  const bmi = weight / (height * height);
+  return bmi.toFixed(1);
+  // return the BMI of someone based off their weight and height
+}
+console.log(calculateBMI(75, 1.74));