Variables and their Data Types in JAVA

Front

How is a variable in programming different from a variable in math? Options: A. In programming, a variable is always a letter that represents an unknown value. B. In programming, a variable is a fixed number. C. In programming, a variable stores a value and has a name, and the value can change. D. There is no difference — they are the same in both math and programming.

Back

In programming, a variable stores a value and has a name, and the value can change.

Front

What is a variable and why do we use it in programming?

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A variable is a name used to store data in a program so it can be reused or changed.

Front

Match the following value to the correct Java data type: "Hello"

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string

Front

Match the value true to the correct Java data type.

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boolean

Front

Match the following value: 75.5

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double

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Match the following value to the correct Java data type: 25

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int

Front

Is this a valid variable name in Java? Why or why not? int 2hot = 100;

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No, because variable names can’t start with a digit.

Front

Which of the following is the correct way to declare a variable to store a student’s GPA (as a decimal)? A. int GPA = "3.7"; B. String GPA = 3.7; C. double GPA = 3.7; D. boolean GPA = "3.7f";

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double GPA = 3.7;