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How can I generate a random math operator? (Eclipse)

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0

I am wondering how to generate a random math operator (+*-/) in eclipse. OR how I can output ("What is " number1 " + " + number2)

I have already tried ("What is " number1 " + " + number2)

//Random number generator

 firstNumber=number.nextInt(10-1)+1;
 secondNumber=number.nextInt(10-1)+1;

//Output

 System.out.println("What is " + firstNumber + secondNumber);

I expect an output of "what is number1 + number2"
eg; "What is 8 + 5"

java

share|improve this question

asked Mar 28 at 18:23

AziomAziom

644 bronze badges

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  This will return you a random operator: "+*-/".charAt(ThreadLocalRandom.current().nextInt(4));
  
  – Not a JD
  Mar 28 at 18:28
  
  

  
  
  
  

add a comment
 | 

0

I am wondering how to generate a random math operator (+*-/) in eclipse. OR how I can output ("What is " number1 " + " + number2)

I have already tried ("What is " number1 " + " + number2)

//Random number generator

 firstNumber=number.nextInt(10-1)+1;
 secondNumber=number.nextInt(10-1)+1;

//Output

 System.out.println("What is " + firstNumber + secondNumber);

I expect an output of "what is number1 + number2"
eg; "What is 8 + 5"

java

share|improve this question

asked Mar 28 at 18:23

AziomAziom

644 bronze badges

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  This will return you a random operator: "+*-/".charAt(ThreadLocalRandom.current().nextInt(4));
  
  – Not a JD
  Mar 28 at 18:28
  
  

  
  
  
  

add a comment
 | 

I am wondering how to generate a random math operator (+*-/) in eclipse. OR how I can output ("What is " number1 " + " + number2)

I have already tried ("What is " number1 " + " + number2)

//Random number generator

 firstNumber=number.nextInt(10-1)+1;
 secondNumber=number.nextInt(10-1)+1;

//Output

 System.out.println("What is " + firstNumber + secondNumber);

I expect an output of "what is number1 + number2"
eg; "What is 8 + 5"

java

share|improve this question

asked Mar 28 at 18:23

AziomAziom

644 bronze badges

 firstNumber=number.nextInt(10-1)+1;
 secondNumber=number.nextInt(10-1)+1;

 System.out.println("What is " + firstNumber + secondNumber);

share|improve this question

asked Mar 28 at 18:23

AziomAziom

644 bronze badges

share|improve this question

asked Mar 28 at 18:23

AziomAziom

644 bronze badges

asked Mar 28 at 18:23

AziomAziom

644 bronze badges

asked Mar 28 at 18:23

AziomAziom

644 bronze badges

3 Answers
3

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2

System.out.println("What is " + firstNumber + " + " + secondNumber);

share|improve this answer

answered Mar 28 at 18:26

bakero98bakero98

53122 silver badges1616 bronze badges

add a comment
 | 

2

You can simply use System.out.printf

System.out.printf("What is %d + %d", firstNumber, secondNumber);

share|improve this answer

answered Mar 28 at 18:26

Aniket SahrawatAniket Sahrawat

7,20022 gold badges1414 silver badges4141 bronze badges

add a comment
 | 

1

To print something like "What is 5 + 8" or * or / or - randomly you can do:

System.out.println(
 "What is "
 + firstNumber 
 + " "
 + "+-*/".charAt((new Random()).nextInt(4))
 + " "
 + secondNumber);

The new Random() creates a random object to which then you apply .nextInt(4) which generates a random number from 0 to 3.

You apply charAt() to "+-*/" with a random location 0 to 3 defined by the random number. This allows you to return a +, -, *, or / randomly.

Lastly, you concatenate "What is " with the first number with the random operator with the second number.

Don't forget to import java.util.Random;

share|improve this answer

edited Mar 28 at 18:42

answered Mar 28 at 18:37

JustAFellowCoderJustAFellowCoder

2381010 bronze badges

add a comment
 | 

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2

System.out.println("What is " + firstNumber + " + " + secondNumber);

share|improve this answer

answered Mar 28 at 18:26

bakero98bakero98

53122 silver badges1616 bronze badges

add a comment
 | 

2

System.out.println("What is " + firstNumber + " + " + secondNumber);

share|improve this answer

answered Mar 28 at 18:26

bakero98bakero98

53122 silver badges1616 bronze badges

add a comment
 | 

System.out.println("What is " + firstNumber + " + " + secondNumber);

share|improve this answer

answered Mar 28 at 18:26

bakero98bakero98

53122 silver badges1616 bronze badges

System.out.println("What is " + firstNumber + " + " + secondNumber);

share|improve this answer

answered Mar 28 at 18:26

bakero98bakero98

53122 silver badges1616 bronze badges

answered Mar 28 at 18:26

bakero98bakero98

53122 silver badges1616 bronze badges

answered Mar 28 at 18:26

bakero98bakero98

53122 silver badges1616 bronze badges

2

You can simply use System.out.printf

System.out.printf("What is %d + %d", firstNumber, secondNumber);

share|improve this answer

answered Mar 28 at 18:26

Aniket SahrawatAniket Sahrawat

7,20022 gold badges1414 silver badges4141 bronze badges

add a comment
 | 

2

You can simply use System.out.printf

System.out.printf("What is %d + %d", firstNumber, secondNumber);

share|improve this answer

answered Mar 28 at 18:26

Aniket SahrawatAniket Sahrawat

7,20022 gold badges1414 silver badges4141 bronze badges

add a comment
 | 

You can simply use System.out.printf

System.out.printf("What is %d + %d", firstNumber, secondNumber);

share|improve this answer

answered Mar 28 at 18:26

Aniket SahrawatAniket Sahrawat

7,20022 gold badges1414 silver badges4141 bronze badges

System.out.printf("What is %d + %d", firstNumber, secondNumber);

share|improve this answer

answered Mar 28 at 18:26

Aniket SahrawatAniket Sahrawat

7,20022 gold badges1414 silver badges4141 bronze badges

answered Mar 28 at 18:26

Aniket SahrawatAniket Sahrawat

7,20022 gold badges1414 silver badges4141 bronze badges

answered Mar 28 at 18:26

Aniket SahrawatAniket Sahrawat

7,20022 gold badges1414 silver badges4141 bronze badges

1

To print something like "What is 5 + 8" or * or / or - randomly you can do:

System.out.println(
 "What is "
 + firstNumber 
 + " "
 + "+-*/".charAt((new Random()).nextInt(4))
 + " "
 + secondNumber);

The new Random() creates a random object to which then you apply .nextInt(4) which generates a random number from 0 to 3.

You apply charAt() to "+-*/" with a random location 0 to 3 defined by the random number. This allows you to return a +, -, *, or / randomly.

Lastly, you concatenate "What is " with the first number with the random operator with the second number.

Don't forget to import java.util.Random;

share|improve this answer

edited Mar 28 at 18:42

answered Mar 28 at 18:37

JustAFellowCoderJustAFellowCoder

2381010 bronze badges

add a comment
 | 

1

To print something like "What is 5 + 8" or * or / or - randomly you can do:

System.out.println(
 "What is "
 + firstNumber 
 + " "
 + "+-*/".charAt((new Random()).nextInt(4))
 + " "
 + secondNumber);

The new Random() creates a random object to which then you apply .nextInt(4) which generates a random number from 0 to 3.

You apply charAt() to "+-*/" with a random location 0 to 3 defined by the random number. This allows you to return a +, -, *, or / randomly.

Lastly, you concatenate "What is " with the first number with the random operator with the second number.

Don't forget to import java.util.Random;

share|improve this answer

edited Mar 28 at 18:42

answered Mar 28 at 18:37

JustAFellowCoderJustAFellowCoder

2381010 bronze badges

add a comment
 | 

To print something like "What is 5 + 8" or * or / or - randomly you can do:

System.out.println(
 "What is "
 + firstNumber 
 + " "
 + "+-*/".charAt((new Random()).nextInt(4))
 + " "
 + secondNumber);

The new Random() creates a random object to which then you apply .nextInt(4) which generates a random number from 0 to 3.

You apply charAt() to "+-*/" with a random location 0 to 3 defined by the random number. This allows you to return a +, -, *, or / randomly.

Lastly, you concatenate "What is " with the first number with the random operator with the second number.

Don't forget to import java.util.Random;

share|improve this answer

edited Mar 28 at 18:42

answered Mar 28 at 18:37

JustAFellowCoderJustAFellowCoder

2381010 bronze badges

System.out.println(
 "What is "
 + firstNumber 
 + " "
 + "+-*/".charAt((new Random()).nextInt(4))
 + " "
 + secondNumber);

share|improve this answer

edited Mar 28 at 18:42

answered Mar 28 at 18:37

JustAFellowCoderJustAFellowCoder

2381010 bronze badges

answered Mar 28 at 18:37

JustAFellowCoderJustAFellowCoder

2381010 bronze badges

answered Mar 28 at 18:37

JustAFellowCoderJustAFellowCoder

2381010 bronze badges