In the event driven programming language use can directly 
interact with user interface by making use of mouse or any 
other means of controls. But in procedural prog you cannot 
interct with user interface through any of the control. you 
can only interct through codes.

Events are caused by actions the user performs. For 
example, clicking the mouse generates a mouse event, 
pressing a key on the keyboard generates a keyboard event, 
and so on. When a system event occurs, the operating system 
is responsible for identifying and responding to the event. 
Different operating systems implement this process in 
various ways. However, all operating systems respond to the 
system event by broadcasting a system event message. Any 
application running on the system can react to the system 
event by executing code written for that specific system 
event.

In procedural-driven or top-down architectures, the 
application executes a set of instructions in a specified 
sequence to perform a task. The structure and sequence of 
the program, not user actions, control the execution order 
of a procedural-driven application. The program execution 
begins in main and then flows through method calls and 
control statements in a fairly predictable manner.

In an event-driven program, the program first waits for 
events to occur, responds to those events, then returns to 
waiting for the next event. How the program responds 
depends on the code written for that specific event. The 
order in which an event-driven program executes depends on 
which events occur and on the order in which those events 
occur. While the program waits for the next event, it frees 
up CPU resources that might be used to perform other 
processing tasks.

Procedural Programming language is the language, which is
run by the some procedure or methods of that language.

Event Driven Programming language is the language, which is
run by some event of the input device. like mouse click,
mouse drag, keyboard key press, key down, etc..