Which of the following is the correct way to declare a variable in Java?

Java MCQ: Which of the following is the correct way to declare a variable in Java?

a) int 1x = 10;
b) int x = 10;
c) float x = 1.0;
d) string x = “Hello”;

Answer:

b) int x = 10;

Explanation:

In Java, variable declaration follows specific syntax rules. The correct way to declare a variable includes specifying the data type followed by a valid identifier (variable name) and optionally initializing it with a value.

For example, int x = 10; declares an integer variable named x and assigns it the value 10. The variable name must start with a letter, dollar sign $, or underscore _, and cannot start with a digit.

Additionally, Java is case-sensitive, so keywords like String must be correctly capitalized. Incorrect declarations, such as using a digit to start a variable name or incorrect data types, will result in compilation errors.

Reference links:

https://www.rameshfadatare.com/learn-java-programming/
https://www.javaguides.net/p/java-tutorial-learn-java-programming.html

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