Valid and Invalid Variables in Java

Which of the following is a valid Java keyword?

• var

• 123switch

• _if

• public

Choose the invalid variable name in Java.

• myVariable

• $variable

• _variableName

• 123variable

Identify the invalid variable name in Java.

• myVariable

• $variable

• _variable Name

• variable123

Identify the invalid variable name in Java.

• myVariable

• *variable

• _variableName

• variable123

Which of the following is a valid Java keyword?

• var

• 123switch

• _if

• public

What is the correct rule for identifiers in Java?

• Identifiers can start with a number

• Identifiers can contain special characters like @, #, and %

• Identifiers are case-insensitive

• Identifiers cannot be a keyword

Which of the following is a valid variable name in Java?

• 123variable

• _variable

• variable$

• variable_name

What is the correct rule for identifiers in Java?

• Identifiers can start with a number

• Identifiers can contain special characters like @, #, and %

• Identifiers are case-insensitive

• Identifiers cannot be a keyword

What is the correct rule for identifiers in Java?

• Identifiers can start with a special character

• Identifiers can have spaces in between

• Identifiers cannot be a reserved keyword

• Identifiers can be of any length

Which of the following is a valid variable name in Java?

• 123variable

• _variable

• variable$

• variable_name