Procedure Call:Purpose: Call a function or procedure.Example: result = add(a, b);Three-Address Code: param a, param b, result = call add

"Procedure Call" refers to the process of invoking a function or procedure in a program. Here's a step-by-step explanation of the example you provided:

1. "result = add(a, b);": This is a function call in a high-level programming language like C, C++, or Java. 'add' is the function being called, and 'a' and 'b' are the arguments being passed to the function. The result of the function call is being assigned to the variable 'result'.

2. "param a, param b": This is a representation of the function call in three-address code, an intermediate code used by compilers. 'param' is a keyword that indicates the following value is a parameter to be passed to a function.

3. "result = call add": This is the actual call to the function 'add' in three-address code. The 'call' keyword is used to invoke the function, and the result of the function call is assigned to the variable 'result'.

So, the entire line "param a, param b, result = call add" is a representation of the high-level function call "result = add(a, b);" in three-address code.