Your initial code you gave me!

Nutriants/splits.ps1

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+#VARS
+[decimal]$Weight = Read-Host "Please input weight in kg"
+[decimal]$Height = Read-Host "Please input height in cm"
+[decimal]$Age = Read-Host "Please input age in years"
+[char]$Gender = Read-Host "Are you Male (M) or Female (F)".ToUpper()
+
+#determining split (female)
+if ($Gender = "F") {
+    $Calories = 655.1 + (9.563 * $weight) + (1.850 + $Height) - (4.676 * $Age)
+    
+    $Protein_Cals = ($Calories/10)*2
+    $Carbs_Cals = ($Calories/10)*6
+    $Fat_Cals = ($Calories/10)*2
+    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"
+}
+#determing split (male)
+elseif ($Gender = "M") {
+    $Calories = 66.47 + (13.75 * $weight) + (5.003 + $Height) - (6.755 * $Age)
+    $Protein = $Calories/4
+    $Carbs = $Calories/4
+    $Fats = $Calories/9
+    Write-Host "Your BMR is: " $Calories
+    Write-Host "Your recommended protein intake is: " $Protein
+    Write-Host "Your recommended carbohydrate intake is: " $Carbs
+    Write-Host "Your recommended fat intake is: " $Fats
+}
+else {
+    Exit-PSSession
+}
+Exit-PSSession