The Art of Assembly Language, 2nd Edition

7.10 Loops

Loops represent the final basic control structure (sequences, decisions, and loops) that make up a typical program. Like so many other structures in assembly language, you'll find yourself using loops in places you've never dreamed of using loops. Most high-level languages have implied loop structures hidden away. For example, consider the BASIC statement if A$ = B$ then 100. This if statement compares two strings and jumps to statement 100 if they are equal. In assembly language, you would need to write a loop to compare each character in A$ to the corresponding character in B$ and then jump to statement 100 if and only if all the characters matched. In BASIC, there is no loop to be seen in the program. Assembly language requires a ...