Languages with dynamic typing, such as JavaScript, allow the interpreter to type variables at runtime based on their current values.
A type of high-level programming language known as dynamic programming languages, or DPLs, executes many typical behaviors at runtime that other languages might only conduct during compilation, if at all.
In contrast, type-checking happens during execution in languages that use dynamic typing.
This indicates that variables are only type-checked when the program is running.
The programming languages Python, JavaScript, Lisp, PHP, Ruby, Perl, Lua, and Tcl are some examples of those that fall under this group.