Jay001

import java.util.Scanner;

public class program {
     public static void main(String[] args) {
      string score;
      Scanner scan = new Scanner(System.in);
       
        
         System.out.println("please type your score");
         score=scan.nextLine();
        
         if (score>90) {
          System.out.println("you got an A");
         }
        
        
        
     }      
        
 }

which part did I do wrong with my code?

 

 

import java.util.Scanner;

public class program {
     public static void main(String[] args) {
      int x;
      Scanner scan = new Scanner(System.in);
       
        
         System.out.println("please type your score");
         x=scan.nextLine();
        
         if (x>90) {
          System.out.println("you got an A");
         }
        
        
        
     }      
        
 }

don't understand why we should set up the variable to be 0?

 

public static void main(String[] args) {
        String recipeName, userInputStr;
        int userInputInt;
        int numberOfServings = 0;
        double totalCalories = 0;
        double totalFat = 0;
        double totalCholesterol = 0;
        double totalCarbohydrate = 0;
        double totalProtein = 0;
        Scanner inputStream = new Scanner(System.in);

        System.out.println(" name of this recipe? ");
        recipeName = inputStream.nextLine();

        System.out.println(" How many servings? ");
        userInputStr = inputStream.nextLine();
        numberOfServings = Integer.parseInt(userInputStr);
        if (numberOfServings < SERVINGS_MIN || numberOfServings > SERVINGS_MAX) {
            System.out.println(" Wrong number of servings.");
            System.exit(-1);
        }

        System.out.println("----------List of Possible Ingridients==========");
        System.out.println(INDENT + "Food #1: " + FOOD_1_NAME);
        System.out.println(INDENT + "Food #2: " + FOOD_2_NAME);
        System.out.println(INDENT + "Food #3: " + FOOD_3_NAME);
        System.out.println(INDENT + "Food #4: " + FOOD_4_NAME);
        System.out.println(INDENT + "Food #5: " + FOOD_5_NAME);

        System.out.println(" How many grams of " + FOOD_1_NAME + "? ");
        userInputStr = inputStream.nextLine();
        userInputInt = Integer.parseInt(userInputStr);
        if (userInputInt < GRAMS_MIN || userInputInt > GRAMS_MAX) {
            System.out.println(" Wrong number of grams.");
            System.exit(-1);
        }
        totalCalories += userInputInt * (FOOD_1_CALORIES_P100G / 100.);
        totalFat += userInputInt * (FOOD_1_FAT_P100G / 100.);
        totalCholesterol += userInputInt * (FOOD_1_CHOLESTEROL_P100G / 100.);
        totalCarbohydrate += userInputInt * (FOOD_1_CARBOHYDRYTE_P100G / 100.);
        totalProtein += userInputInt * (FOOD_1_PROTEIN_P100G / 100.);