WriteSelection-WE1-P1

Section 6.2 WriteSelection-WE1-P1

Subgoals for Writing Selection Statements.

If Statement

🔗

Define how many mutually exclusive paths are needed
🔗

🔗
Order from most restrictive/selective group to least restrictive
🔗

🔗
Write if statement with Boolean expression
🔗

🔗
Follow with true bracket including action
🔗

🔗
Follow with else bracket
🔗

🔗
Repeat until all groups and actions are accounted for
🔗

🔗

🔗

OR Switch Statement

🔗

Determine variable / expression for mutually exclusive ranges
🔗

🔗
Write switch statement based on variable / expression
🔗

🔗
Each range is a ‘case’
🔗

🔗
Include break statements and default case if needed
🔗

🔗

🔗

Subsection 6.2.1

Exercises Exercises

1.

Q5: Put the code in the right order to create a program that will generate an integer value between 0 and 25, print the value, and if the value is greater than 18, print a message saying “This is an overload”; otherwise print a message saying “Not an overload”.

🔗

import java.util.*;
public class main {
   public static void main(String[] args) {
---
      Random r = new Random();
      int x = r.nextInt(26);
      System.out.println(x);
---
      if (x > 18)
---
         System.out.println("This is an overload.");
---
      else
---
         System.out.println("Not an overload.");
---
   }
}

🔗

2.

Q6: Put the code in the right order to create a program that will generate an integer value between 3 and 7, print the value, and if the value is equal to 5 then set the character variable classType equal to ‘G’, and print a message saying “graduate student”; otherwise set classType equal to ‘U’ and print a message saying “undergraduate”.

🔗

import java.util.*;
public class main {
   public static void main(String[] args){
---
      Random r = new Random();
      char classType = 'x';
      int x = 3 + r.nextInt(5);
      System.out.println(x);
---
      if (x == 5) {
---
         classType = 'G';
         System.out.println("graduate student");
---
      }
      else {
---
         classType = 'U';
         System.out.println("undergraduate student");
      }
---
   }
}

🔗

3.

Q7: Put the code in the right order to create a program that will generate the value for a year (1500 to 3000 inclusive) and print the value. Then it will print true if the year is a leap year, otherwise the program prints false. A leap year is a multiple of 4, with one exception: if the year is a multiple of 100 but not 400, then it is not a leap year. For example, the year 1900 was not a leap year, but the year 2000 was indeed a leap year.

🔗

import java.util.*;
public class main {
   public static void main(String[] args){
---
      Random r = new Random();
      int x = 1500 + r.nextInt(1501);
      boolean result = false;
---
      System.out.println(x);
---
      if (x % 4 == 0)
---
         if (x % 100 == 0)
---
            if (x % 400 == 0)
               result = true;
            else
               result = false;
---
         else
            result = true;
---
      else
         result = false;
---
      System.out.println(result);
---
   }
}

🔗

You have attempted of activities on this page.

🔗

Prev Top Next