Type conversion

Type conversion (or typecasting) means transfer of data from one data type to another. Implicit conversion happens when the compiler (for compiled languages) or runtime (for script languages like {{glossary("JavaScript")}}) automatically converts data types. The source code can also explicitly require a conversion to take place.

For example, given the expression "foo" + 1, the {{glossary("Number")}} 1 is implicitly converted into a {{glossary("String")}} and the expression returns "foo1". Given the instruction Number("0x11"), the string "0x11" is explicitly converted to the number 17.

See also​

See also