/usr/share/GvRng/po/Summary-en.txt is in gvrng 4.4-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 | Guido van Robot Programming Summary
The Five Primitive Guido van Robot Instructions:
1. move
2. turnleft
3. pickbeeper
4. putbeeper
5. turnoff
Block Structuring
Each Guido van Robot instruction must be on a separate line.
A sequence of Guido van Robot instructions can be treated as a single
instruction by indenting the same number of spaces.
<instruction> refers to any of the five primitive instructions above,
the conditional branching or iteration instructions below,
or a user defined instruction.
<instruction>
<instruction>
...
<instruction>
Conditionals
GvR has eighteen built-in tests that are divided into three groups:
the first six are wall tests, the next four are beeper tests,
and the last eight are compass tests:
1. front_is_clear
2. front_is_blocked
3. left_is_clear
4. left_is_blocked
5. right_is_clear
6. right_is_blocked
7. next_to_a_beeper
8. not_next_to_a_beeper
9. any_beepers_in_beeper_bag
10. no_beepers_in_beeper_bag
11. facing_north
12. not_facing_north
13. facing_south
14. not_facing_south
15. facing_east
16. not_facing_east
17. facing_west
18. not_facing_west
Conditional Branching
Conditional branching refers to the ability of a program to alter it's
flow of execution based on the result of the evaluation of a conditional.
The three types of conditional branching instructions in Guido van Robot
are if and if/else and if/elif/else.
<test> refers to one of the eighteen conditionals above.
if <test>:
<instruction>
if <test>:
<instruction>
else:
<instruction>
if <test>:
<instruction>
elif <test>:
<instruction>
...
elif <test>:
<instruction>
else:
<instruction>
Iteration
Iteration refers to the ability of a program to repeate an
instruction (or block of instructions) over and over until some condition
is met.
The two types of iteration instructions are the do and while instructions.
<positive_number> must be an integer greater than 0.
do <positive_number>:
<instruction>
while <test>:
<instruction>
Defining a New Instruction:
New instructions can be created for Guido van Robot using the define statement.
<new_name> can be any sequence of letters or digits as long as it begins with a
letter and is not already used as an instruction.
Letters for Guido van Robot are A..Z, a..z, and the underscore (_) character.
Guido van Robot is case sensitive, so TurnRight, turnright, and turnRight are all
different names.
define <new_name>:
<instruction>
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