evaluate to either true or false. Everything in evaluates to true and everything in evaluates to false. This language does not have a separate character type. Characters are represented as strings of length 1. Enumerations in this language are algebraic types with only nullary constructors The value of is provided by the intrinsic function. Derived types Array In most expressions (except the sizeof and operators), values of array types in C are automatically converted to a pointer of its first argument. See C syntax#Arrays for further details of syntax and pointer operations. The C-like type x[] works in Java, however type[] x is the preferred form of array declaration. Subranges are used to define the bounds of the array. JavaScript's array are a special kind of object. The clause in COBOL does not create a true variable length array and will always allocate the maximum size of the array. Other types Only classes are supported. s in C++ are actually classes, but have default public visibility and are also POD objects. C++11 extended this further, to make classes act identically to POD objects in many more cases. pair only Although Perl doesn't have records, because Perl's type system allows different data types to be in an array, "hashes" (associative arrays) that don't have a variable index would effectively be the same as records. Enumerations in this language are algebraic types with only nullary constructors Variable and constant declarations Pascal has declaration blocks. See functions. Types are just regular objects, so you can just assign them. In Perl, the "my" keyword scopes the variable into the block. Technically, this does not declare name to be a mutable variable—in ML, all names can only be bound once; rather, it declares name to point to a "reference" data structure, which is a simple mutable cell. The data structure can then be read and written to using the and {{code|:}} operators, respectively. If no initial value is given, an invalid value is automatically assigned (which will trigger a run-time exception if it used before a valid value has been assigned). While this behaviour can be suppressed it is recommended in the interest of predictability. If no invalid value can be found for a type (for example in case of an unconstraint integer type), a valid, yet predictable value is chosen instead. In Rust, if no initial value is given to a or variable and