Art of Assembly Language, 1st Edition

7.11. 7.11 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. In assembly language, ...