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| -rw-r--r-- | subx/Readme.md | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/subx/Readme.md b/subx/Readme.md index 099ddfde..cb00eae0 100644 --- a/subx/Readme.md +++ b/subx/Readme.md @@ -218,9 +218,10 @@ This program sums the first 10 natural numbers. By convention I use horizontal tabstops to help read instructions, dots to help follow the long lines, comments before groups of instructions to describe their high-level purpose, and comments at the end of complex instructions to state the low-level -operation they perform. Numbers are always in hexadecimal (base 16); the '0x' -prefix is optional, and I tend to include it as a reminder when numbers look -like decimal numbers or words. +operation they perform. Numbers are always in hexadecimal (base 16) and must +start with a digit ('0'..'9'); use the '0x' prefix when a number starts with a +letter ('a'..'f'). I tend to also include it as a reminder when numbers look +like decimal numbers. Try running this example now: |