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| -rw-r--r-- | forth.html.markdown | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/forth.html.markdown b/forth.html.markdown index 76fdf425..77358dcd 100644 --- a/forth.html.markdown +++ b/forth.html.markdown @@ -20,7 +20,7 @@ Forth, but most of what is written here should work elsewhere. \ --------------------------------- Precursor ---------------------------------- -\ It's important to know how forth processes instructions. All +\ It's important to know how Forth processes instructions. All \ programming in Forth is done by manipulating what's known as the parameter \ stack (more commonly just referred to as "the stack"). Typing: 5 2 3 56 76 23 65 @@ -69,8 +69,8 @@ Forth, but most of what is written here should work elsewhere. \ Quite often one will want to write their own words. : square ( n -- n ) dup * ; \ ok -\ The `:` word sets forth into compile mode. `(` and `)` are both words which -\ tell forth to ignore between them. Up until the `;` word is what our word +\ The `:` word sets Forth into compile mode. `(` and `)` are both words which +\ tell Forth to ignore between them. Up until the `;` word is what our word \ does. \ We can check the definition of a word with the `see` word: @@ -78,7 +78,7 @@ see square \ dup * ; ok \ -------------------------------- Conditionals -------------------------------- -\ In forth, -1 is used to represent truth, and 0 is used to represent false. +\ In Forth, -1 is used to represent truth, and 0 is used to represent false. \ The idea is that -1 is 11111111 in binary, whereas 0 is obviously 0 in binary. \ However, any non-zero value is usually treated as being true: 42 42 = / -1 ok @@ -184,13 +184,13 @@ create mynumbers 64 , 9001 , 1337 , \ the last `,` is important! \ As well as reading, we can add to the return stack and remove from it: 5 6 4 >r swap r> .s \ 6 5 4 -\ NOTE: Because forth uses the return stack for word pointers, it's essential +\ NOTE: Because Forth uses the return stack for word pointers, it's essential \ that you set the return stack back to how it was at the end of your \ definition. `>r` should always be followed by `r>`. \ ------------------------- Floating Point Operations -------------------------- -\ Most forths tend to dislike the use of floating point operations. We write +\ Most Forths tend to dislike the use of floating point operations. We write \ floating point operations with scientific notation. 8.3e 0.8e f+ f. \ 9.1 ok |