renamed

Pt9_1-7Bmi/bmiCalculator.ts

@@ -0,0 +1,35 @@
+export const calculateBmi = (height: number, weight: number) => {
+  const bmi = weight / (height ^ 2);
+
+  if (bmi < 15) return "Very severely underweight";
+  else if (bmi < 16) return "Severely underweight";
+  else if (bmi < 18.5) return "Underweight";
+  else if (bmi < 25) return "Normal";
+  else if (bmi < 30) return "Overweight";
+  else if (bmi < 35) return "Moderately obese";
+  else if (bmi < 40) return "Severely obese";
+  else return "Very severely obese";
+};
+
+const parseArguments = (args: string[]): { value1: number; value2: number } => {
+  if (args.length > 4) throw new Error("Not enough arguments");
+  if (args.length < 4) throw new Error("Too many arguments");
+  if (!isNaN(Number(args[2])) && !isNaN(Number(args[3])))
+    return {
+      value1: Number(args[2]),
+      value2: Number(args[3]),
+    };
+  throw new Error("provied values are not numbers");
+};
+
+export const bmiCalculator = () => {
+  try {
+    const { value1, value2 } = parseArguments(process.argv);
+    const message = calculateBmi(value1, value2);
+    console.log(message);
+  } catch (err: unknown) {
+    let errorMessage = "Something went wrong";
+    if (err instanceof Error) errorMessage += " Error " + err.message;
+    console.log(errorMessage);
+  }
+};