Can we use float values in switch-case?

Can we use float values in switch-case?

The value of the expressions in a switch-case statement must be an ordinal type i.e. integer, char, short, long, etc. Float and double are not allowed.

Why does float values are not allowed in switch statement?

Originally Answered: why does float values are not allowed in switch statement? Mostly because the floating point numbers are slightly imprecise and take more time on operations than int type variables/numbers.

Is case label in switch statement must be constant only?

The default statement is executed if no case constant-expression value is equal to the value of expression . A case or default label can only appear inside a switch statement. The type of switch expression and case constant-expression must be integral.

What are the rules for the switch statement?

Rules for switch statement: An expression must always execute to a result. Case labels must be constants and unique. Case labels must end with a colon ( : ). A break keyword must be present in each case.

Can we use enum in switch case?

Yes, You can use Enum in Switch case statement in Java like int primitive. One of the best example of Enum in Java is replace enum int pattern and enum String pattern. You can also use Enum to write Thread-safe Singleton in Java.

Can you use double in switch statement?

Usually switch-case structure is used when executing some operations based on a state variable. There an int has more than enough options. Boolean has only two so a normal if is usually good enough. Doubles and floats aren’t really that accurate to be used in this fashion.

Is it necessary to include default case in a switch statement justify?

No it is not necessary of default case in a switch statement and there is no rule of keeping default case at the end of all cases it can be placed at the starting andd middle of all other cases.

What is not allowed in switch statement?

Some Important rules for switch statements : Duplicate case values are not allowed. The value for a case must be of the same data type as the variable in the switch. The value for a case must be a constant or a literal. Variables are not allowed.

Is a switch faster than if?

A switch statement is usually more efficient than a set of nested ifs. Deciding whether to use if-then-else statements or a switch statement is based on readability and the expression that the statement is testing. Speed: A switch statement might prove to be faster than ifs provided number of cases are good.

Are switch cases faster than if-else?

As it turns out, the switch statement is faster in most cases when compared to if-else , but significantly faster only when the number of conditions is large. The primary difference in performance between the two is that the incremental cost of an additional condition is larger for if-else than it is for switch .

Same way the SWITCH statement works. Its just a counter of some cases and present them according to the conditions applied by the user. Cases value cannot be assigned in float that is the reason why switch cannot accept float data type.

Why is switch case cannot accept floating point in condition?

The switch value is simply an index into a table of addresses that correspond to each case C’s primary use at the time was to write operating systems and operating systems tend to avoid floating point. In fact, at the time when the C language was created floating point probably didn’t even exist, at least not in form we know today.

Can a string be used in a switch statement?

Strings cannot be used in a switch statement’s controlling expression and cannot be used in its case labels. Strings can be used in a switch statement’s controlling expression and in its case labels. Which of the following will count down from 10 to 1 correctly?

Why is there no floating point in C?

C’s primary use at the time was to write operating systems and operating systems tend to avoid floating point. In fact, at the time when the C language was created floating point probably didn’t even exist, at least not in form we know today. Why switch case can’t accept floating-point numbers (Ex:float,double) in condition?