Question

Switch(a) { default: system.out.println("welcome");
} Of which data types can the variable'a' be

Answer 1

Answer:

The variable 'a' can be of any data type except floating point.

Switch Case:

• The switch-case is a special multiway decision-maker that tests whether an expression matches one of the numbers of the constant values, and performs a part of a statement or a block of statements within the case structure.
• The case statement consists of an expression (the selection) and a list of statements, each being associated with one or more constant values of the type of the selector.
• The expression whose value is being compared, can be any valid expression including the value of the variable, an arithmetic expression, logical comparison, bitwise expression, or the return value from a function call, but not a floating-point expression.
• The constants in each of the case statements must obviously be of the same type.
• The expression value is checked with each case and when a match occurs, the statement following that is executed.
• Case statements are generally used for multiway decision-making only but not for repetitive purposes.
• The default case is optional and should be used according to the program’s specific requirements.

Therefore, the data type of the variable 'a' can be an integer, character, etc., except the floating-point.

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Answer 2

Answer:

Except for floating point, any data type may be used for the variable "a."

Explanation:

The process of carrying out a given computation (or, more broadly, achieving a specified computing result) through the design and construction of an executable computer programme is known as computer programming. Analysis, algorithm generation, resource use profiling, and algorithm implementation are some of the duties involved in programming (usually in a chosen programming language, commonly referred to as coding). [1] [2] Instead of being written in machine code, which is immediately executed by the CPU, a programme is written in one or more languages that are understandable to programmers. Finding a set of instructions that will automate the completion of a task on a computer—a task that can be as complicated as an operating system—often with the goal of addressing a specific problem—is the goal of programming.

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