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oksano4ka [1.4K]
3 years ago
10

Given two variables, is Empty of type boolean, indicating whether a class roster is empty or not, and number Of Credits of type

int, containing the number of credits for a class, write an expression that evaluates to true if the class roster is empty or the class is exactly three credits.
Computers and Technology
1 answer:
Alex_Xolod [135]3 years ago
4 0

Answer:

     if(isEmpty || numOfCredits==3){

         

     }

Explanation:

Consider a complete java program below that prompts user for  number of credits and also asks if class roster is empty or not

<em>import java.util.Scanner;</em>

<em>public class num13 {</em>

<em>    public static void main(String[] args) {</em>

<em>        boolean isEmpty = false;</em>

<em>        Scanner in = new Scanner(System.in);</em>

<em>        System.out.println("Is class Rooster Empty? Yes or No");</em>

<em>        String ans = in.next();</em>

<em>        if(ans.equalsIgnoreCase("yes")){</em>

<em>            isEmpty = true;</em>

<em>        }</em>

<em>        else isEmpty =false;</em>

<em>        System.out.println("Enter number of credits");</em>

<em>      int numOfCredits = in.nextInt();</em>

<em>      if(isEmpty||numOfCredits==3){</em>

<em>          System.out.println("True");</em>

<em>      }</em>

<em>      else {</em>

<em>          System.out.println("Not true");</em>

<em>      }</em>

<em>    }</em>

<em>}</em>

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//here is code in java.

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Explanation:

declare and initialize two string variables.Create another string variable "st3". first assign value of "st1" to "st3" after then value of "st2" to "st1" and then  assign value of "st3" to "st2". This will exchange the values of both the string.

Output:

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