float, double, decimal C# with Example

float 
float is an alias to the .NET datatype System.Single. It allows IEEE 754 single-precision floating point numbers to 
be stored. This data type is present in mscorlib.dll which is implicitly referenced by every C# project when you 
create them. 
Approximate range: -3.4 × 1038 to 3.4 × 1038 
Decimal precision: 6-9 significant digits 
Notation: 
float f = 0.1259; 
var f1 = 0.7895f; // f is literal suffix to represent float values 
It should be noted that the float type often results in significant rounding errors. In applications where 
precision is important, other data types should be considered. 
double 
double is an alias to the .NET datatype System.Double. It represents a double-precision 64-bit floating-point 
number. This datatype is present in mscorlib.dll which is implicitly referenced in any C# project. 
Range: ±5.0 × 10− 324 to ±1.7 × 10308 
Decimal precision: 15-16 significant digits 
Notation: 
double distance = 200.34; // a double value 
double salary = 245; // an integer implicitly type-casted to double value 
var marks = 123.764D; // D is literal suffix to represent double values 
decimal 
decimal is an alias to the .NET datatype System.Decimal. It represents a keyword indicates a 128-bit data type. 
Compared to floating-point types, the decimal type has more precision and a smaller range, which makes it 
appropriate for financial and monetary calculations. This datatype is present in mscorlib.dll which is implicitly 
referenced in any C# project. 
Range: -7.9 × 1028 to 7.9 × 1028 
Decimal precision: 28-29 significant digits 
 

Notation: 
decimal payable = 152.25m; // a decimal value 
var marks = 754.24m; // m is literal suffix to represent decimal values