Part 12 C# Basic Intro Float and Double Data Types


variables, floating numbers (float & double),
Float and Double Capacity,
I will explain Suffix letters (F, UL, M, D…) in next Video session.
What is the difference between a double and a float?

#float #double #floatinCsharp #doubleinCsharp
If there is no double type in the expression, the expression evaluates to float or bool in relational or Boolean expressions. +. A floating-point expression can contain the following sets of values: +. Positive and negative zero. Positive and negative infinity. Not-a-Number value (NaN). The finite set of nonzero.
Float is a floating-point number. The C# language provides this type as a single-precision floating point number representation. Float is less precise than a double. It occupies four bytes and is no larger than an int.
Suffixes. You will need to use the character suffix “f” or “F” on constants you want to be treated as float values. If you don’t specify “f” or “F”, you will get a compile-time error. The C# compiler treats these values as doubles by default.
This program shows how to specify floats with “f” or “F”. It is often preferred to use the uppercase F to reduce confusion.
Test float. The float type can be used in the same ways that other numeric types in the C# language can be used. You can convert floats to strings, either with ToString or through Console.WriteLine. You can use negative floating point numbers.
The expression typeof(float) in the program, as well as the GetType method, both return the System.Single type. The C# language aliases the float keyword to System.Single so they are precisely equivalent.
Constant fields. There are several constant fields on the float type. This program shows the float.Epsilon constant, which is the smallest float value greater than zero. The NaN constant represents not a number.
Discussion. So when should you use the float type in your C# programs? Typically, if you need to use floating point numbers, using the double type instead is a better choice because it has more precision and is probably more common.
The double type uses more memory than the float type. In a large array this difference becomes relevant.

Using a float instead of a double can be beneficial if you are sure the loss of precision is immaterial.

Another reason to use float is simply for compatibility (interoperability) with other software that uses floats. It is best to match the types closely to existing software to alleviate inconsistencies between different code bases.
Summary. Float is commonly needed low-level types. Instead, its best uses are for compatibility issues when you need to represent floating-point numbers. Double is usually better for storing large numbers with decimals.
What is the difference between a double and a float?
Double is an 8-byte numeric type. It is used to store large and small values. It also stores fractional values such as 1.5 and negative values such as -1.5. It requires more memory than an int.
A double is declared in the same way as an int. You use the double type in the declaration, and can assign it using the assignment operator “=”. It offers fractional values. It accommodates large and small numbers.


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