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Questions and Answers
What data type should be used for the variable newFee to enable the Course class to compile?
What data type should be used for the variable newFee to enable the Course class to compile?
- int newFee;
- long newFee;
- double newFee; (correct)
- float newFee;
What is the value of newFee if the code compiles and runs successfully?
What is the value of newFee if the code compiles and runs successfully?
- $50.0
- $5000.00 (correct)
- $50.00
- $5000.0
Which data type has a higher precision in Java?
Which data type has a higher precision in Java?
- float
- int
- long
- double (correct)
What happens if the variable percentage is declared as double instead of float?
What happens if the variable percentage is declared as double instead of float?
Which of the following statements about floating-point numbers in Java is true?
Which of the following statements about floating-point numbers in Java is true?
Flashcards
What is a double?
What is a double?
A 64-bit floating-point number. It has higher precision than float in Java.
Which has higher precision: double or float?
Which has higher precision: double or float?
A floating-point data type with higher precision in Java, capable of storing larger and more precise decimal numbers compared to float.
What if percentage is double instead of float?
What if percentage is double instead of float?
It will have no impact on the result because double can accommodate any value that a float can.
What is -1.0 * Double.POSITIVE_INFINITY?
What is -1.0 * Double.POSITIVE_INFINITY?
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Study Notes
Data Type for newFee
- The variable newFee should be declared as a double to enable the Course class to compile.
Value of newFee
- The value of newFee depends on the calculation and values used in the code, but if the code compiles and runs successfully, it will hold a decimal value.
Precision in Java
- double data type has a higher precision than float in Java.
Declaring percentage as double
- If the variable percentage is declared as double instead of float, it will be able to hold more precise decimal values and reduce the risk of precision loss.
Floating-point Numbers in Java
- In Java, floating-point numbers are represented as binary fractions, which can lead to slight precision errors due to the conversion from decimal to binary.
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