Integer literals

print(255)        // decimal literal (Int)
print(255L)       // decimal literal (Long)
print(0000'00FF)  // hexadecimal literal
print(00'FF)      // short hexadecimal literal
print(F'F)        // ultrashort (single-byte) hexadecimal literal
print(377o)       // octal literal
print(1111'1111b) // binary literal
print(255'000)    // decimal literal
print(1'00000000) // special hexadecimal literal

Output:

Note that digit separator

is necessary for hexadecimal literals.
[Someone might want to put in code a credit card number (like 1234'5678'9012'3456, which is hexadecimal (but not decimal!) literal in 11l), but how frequently this is really needed in practice?]

Why

instead of

— there may be a valid identifier (e.g. the name of the enumerator

C0_FE

).

Long-suffix (character
L
)
If provided, the literal is of type

Long