# #23 – Real Literals

There are several ways to indicate real number (floating point) literals in C#.  Real literals are assumed to be of type double, but may also be of type float or decimal, depending on the suffix included with the literal.

Suffix / type:

• f – float
• d – double
• m – decimal

Here are some examples:

``` // Suffixes
double d1 = 1.0;    // ok
object o1 = 1.0;    // Also double
float f1 = 3f;      // float
float f2 = 1.0f;    // Must have 'f' suffix for float
double d2 = 1.0d;   // Optional 'd' suffix
decimal d3 = 1.0m;

// Exponents
double d4 = 1.2E3;    // 1200
double d5 = 1.2E+3;   // 1200
double d6 = 1.2E-3;   // 0.0012
double d7 = 2E3;      // 2000
double d8 = 2E-3;     // 0.002
float f3 = 2E-3f;
decimal d9 = 2E-3m;
``` About Sean
Software developer in the Twin Cities area, passionate about software development and sailing.

### One Response to #23 – Real Literals

1. kai zhou says:

Thank you Sean.

The suffix could also be:

float — suffix with ‘F’ e.g. float f2 = 0.1F;
double –suffix with ‘D’ e.g. double d2 = 0.1D;
decmial –suffix with ‘M’ e.g. decimal dm2 = 0.1M;

tested on Visual Studio 2013, Version Update 2