Add functionality to calculate BMI and checks BMI categories

Nutrition/splits.ps1

@@ -1,20 +1,15 @@
-# User input
+# Input user information
 $Weight = Read-Host "Please input weight in kg" -As [decimal]
 $Height = Read-Host "Please input height in cm" -As [decimal]
 $Age = Read-Host "Please input age in years" -As [decimal]
 $Gender = Read-Host "Are you Male (M) or Female (F)" -As [char] | ForEach-Object { $_.ToString().ToUpper() }
 
 # Calculate BMR and nutrient intake
-if ($Gender -eq "F")
-{
+if ($Gender -eq "F") {
     $Calories = 655.1 + (9.563 * $Weight) + (1.850 * $Height) - (4.676 * $Age)
-}
-elseif ($Gender -eq "M")
-{
+} elseif ($Gender -eq "M") {
     $Calories = 66.47 + (13.75 * $Weight) + (5.003 * $Height) - (6.755 * $Age)
-}
-else
-{
+} else {
     Write-Host "Invalid gender. Exiting."
     Exit
 }
@@ -23,8 +18,24 @@ $Protein_Cals = ($Calories / 10) * 2
 $Carbs_Cals = ($Calories / 10) * 6
 $Fat_Cals = ($Calories / 10) * 2
 
+# Calculate BMI and determine BMI category
+$BMI = ($Weight / ($Height / 100) / ($Height / 100))
+$BMICategory = "Unknown"
+
+if ($BMI -lt 18.5) {
+    $BMICategory = "Underweight"
+} elseif ($BMI -ge 18.5 -and $BMI -lt 24.9) {
+    $BMICategory = "Normal Weight"
+} elseif ($BMI -ge 25 -and $BMI -lt 29.9) {
+    $BMICategory = "Overweight"
+} elseif ($BMI -ge 30) {
+    $BMICategory = "Obese"
+}
+
 # Display results
 Write-Host "Your BMR is: " ([math]::Round($Calories, 0))
 Write-Host "Your recommended protein intake is: " ([math]::Round($Protein_Cals, 0)) "kcals"
 Write-Host "Your recommended carbohydrate intake is: " ([math]::Round($Carbs_Cals, 0)) "kcals"
 Write-Host "Your recommended fat intake is: " ([Math]::Round($Fat_Cals, 0)) "kcals"
+Write-Host "Your BMI is: " ([math]::Round($BMI, 2))
+Write-Host "Your BMI Category is: $BMICategory"