Update

tutorial/CalLDLCholesterol.java

@@ -0,0 +1,31 @@
+package tutorial;
+
+import java.util.Scanner;
+
+public class CalLDLCholesterol{
+
+public static void main(String[] args) {
+
+	Scanner input = new Scanner(System.in);
+
+    //Total Cholesterol (TC), HDL cholesterol (HDLC), triglyceride (TG), LDL cholesterol (LDLC) 
+    //LDLC = TC - HDLC - TG / 5
+	int TC, HDLC, TG;
+	float LDLC;
+	
+	System.out.println("This program can be used to calculate LDL Cholesterol");
+	
+	System.out.print("Enter Total Cholesterol (TC) : ");
+	TC = input.nextInt();
+	
+	System.out.print("Enter HDL Cholesterol (HDLC) : ");
+	HDLC = input.nextInt();
+	
+	System.out.print("Enter Triglyceride (TG)      : ");
+	TG = input.nextInt();
+	
+	LDLC = TC - HDLC - TG / 5;
+	System.out.println("LDL Cholesterol (LDLC) = " + LDLC);
+	
+    }
+}

tutorial/ValidateHKID.java

@@ -10,26 +10,26 @@ public class ValidateHKID {
 	String str = input.nextLine();
 
 	char[] strHKID;
-	int int_Sum;
-	int int_Code;
+	int sum;
+	int code;
 	strHKID = str.toCharArray();
 	strHKID[0] = Character.toUpperCase(strHKID[0]);
-	int_Sum = ( (int)strHKID[0] -64 ) *8;
-	int_Sum = int_Sum + ( (int)strHKID[1] -48 ) *7;
-	int_Sum = int_Sum + ( (int)strHKID[2] -48 ) *6;
-	int_Sum = int_Sum + ( (int)strHKID[3] -48 ) *5;
-	int_Sum = int_Sum + ( (int)strHKID[4] -48 ) *4;
-	int_Sum = int_Sum + ( (int)strHKID[5] -48 ) *3;
-	int_Sum = int_Sum + ( (int)strHKID[6] -48 ) *2;
-	int_Code = 11 - ( int_Sum % 11);
+	sum = ( (int)strHKID[0] -64 ) *8;
+	sum = sum + ( (int)strHKID[1] -48 ) *7;
+	sum = sum + ( (int)strHKID[2] -48 ) *6;
+	sum = sum + ( (int)strHKID[3] -48 ) *5;
+	sum = sum + ( (int)strHKID[4] -48 ) *4;
+	sum = sum + ( (int)strHKID[5] -48 ) *3;
+	sum = sum + ( (int)strHKID[6] -48 ) *2;
+	code = 11 - ( sum % 11);
 
 	System.out.print("The HKID is: " + strHKID[0] + str.substring(1,7));
-	if (int_Code == 11) {
+	if (code == 11) {
 			System.out.println("(0)");
-	} else if(int_Code == 10) {
+	} else if(code == 10) {
 		System.out.println("(A)");
 	} else {
-		System.out.println( "(" + int_Code + ")" );
+		System.out.println( "(" + code + ")" );
 		}
 
 	}