C++

9.3    Literals

Literals are fixed, concrete values directly written in the source code. In C++, these can be integers, floating-point numbers, characters, or strings. The basics are the easily recognizable forms 123 and 3.141592 for numbers, 'a' as a single character, and "Gugelhupf" as a string.

It only becomes a bit more complicated because there are prefix and suffix modifiers for these base literals. As you have already seen in Chapter 4, Section 4.4, there are the following forms for integers, floating-point numbers, Boolean values, and strings:

999       0xffff    0777      0b10101   1L        0u  // integer forms72.75     1e+10     3.141592f                         // floating point'a'       "Text"                                      // stringstrue      false           // truth values, the two bool literalsnullptr // the only nullptr_t literal ...