What is vhdl loop?

In VHDL, loops are used to perform repetitive tasks where the number of iterations is not known in advance or may change at runtime. There are two types of loops in VHDL:

1. For loop: A for loop is used when the number of iterations is known in advance. It is similar to a for loop in other programming languages.

Syntax of a for loop:

for i in range loop --statements to be executed end loop;

Example:

for i in 0 to 10 loop --statements to be executed end loop;

2. While loop: A while loop is used when the number of iterations is not known in advance. It repeats the statements until the condition becomes false.

Syntax of a while loop:

while condition loop --statements to be executed end loop;

Example:

while i<10 loop --statements to be executed i:=i+1; end loop;

Loops are useful in VHDL for implementing iterative algorithms, testing and simulation. They allow for efficient code development and can simplify complex designs by reducing the amount of code needed.