Can we use float value 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.
Can we use double in switch-case?
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.
Can your switch statement accept long double or float data type?
The switch statement doesn’t accept arguments of type long, float, double,boolean or any object besides String.
When would you use float instead of doubles?
Use float if you have memory constraint because it takes almost half as much space as double. If your numbers cannot fit in the range offered by float, then use double. Though be careful with floating-point calculation and representation, don’t use double or float for monetary calculation, instead use Big Decimal.
Which data type is not allowed for switch case in C?
1) The expression used in switch must be integral type ( int, char and enum). Any other type of expression is not allowed.
Which data type is not used in switch case in C?
The value of the ‘expression’ in a switch-case statement must be an integer, char, short, long. Float and double are not allowed.
Why we Cannot use float in switch?
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.
Can you use a double in a switch statement C++?
So we can’t be use float or double in switch case.
Which data type is not valid in switch statement?
When would you use a float data type?
Floating point numbers should be used for what they were designed for: computations where what you want is a fixed precision, and you only care that your answer is accurate to within a certain tolerance. If you need an exact answer in all cases, you’re best using something else.
What is the difference between float and double data type?
A Double and Float are both used to represent decimal numbers, but they do so in slightly different ways. For Float this means that it only has four decimal places while Double still has twelve.
Can we use float in switch case in Java?
Switch case allows only integer and character constants in case expression. We can’t use float values. It executes case only if input value matches otherwise default case executes.
Why the switch statement does not accept float data type?
Your answer is in form of integers right !!! 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.
Can I use a floating point expression to control a switch statement?
There is no provision for using floating point expressions of any kind to control a switch statement. That being said, both the controlling expression and the case labels can be floating point numbers which have been cast to an integer type, but I can’t say that I’ve ever seen that happen.
Is it possible to use float instead of double for Boolean values?
Float and double would be awkward to use reliably even if they were possible – don’t forget that performing exact equality matches on float/double is usually a bad idea anyway, due to the nature of the representation. For Boolean values, why not just use ifto start with?
Is there a way to compare two floating point numbers?
Comparing two floating point numbers (e.g if (x == y) …) can be inaccurate when the decimal equivalents of x and y looks the same to a reasonable precision. Since the switch compares each case for equality, even if it allowed floating point cases, it’d have been largely useless.