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When viewing this file in VSCode, I saw the following warning highlighting lines `15` and `29` ``` The character U+2212 "−" could be confused with the character U+002d "-", which is more common in source code. ``` It seems to me this is just a small oversight, as "-" is used elsewhere in the commented block to denote a negative value, but I'll freely admit ignorance as to any nuance here in using one vs. the other.
52 lines
1.6 KiB
Zig
52 lines
1.6 KiB
Zig
//
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// It seems we got a little carried away making everything "const u8"!
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//
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// "const" values cannot change.
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// "u" types are "unsigned" and cannot store negative values.
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// "8" means the type is 8 bits in size.
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//
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// Example: foo cannot change (it is CONSTant)
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// bar can change (it is VARiable):
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//
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// const foo: u8 = 20;
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// var bar: u8 = 20;
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//
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// Example: foo cannot be negative and can hold 0 to 255
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// bar CAN be negative and can hold -128 to 127
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//
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// const foo: u8 = 20;
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// const bar: i8 = -20;
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//
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// Example: foo can hold 8 bits (0 to 255)
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// bar can hold 16 bits (0 to 65,535)
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//
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// const foo: u8 = 20;
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// const bar: u16 = 2000;
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//
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// You can do just about any combination of these that you can think of:
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//
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// u32 can hold 0 to 4,294,967,295
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// i64 can hold -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
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//
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// Please fix this program so that the types can hold the desired values
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// and the errors go away!
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//
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const std = @import("std");
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pub fn main() void {
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const n: u8 = 50;
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n = n + 5;
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const pi: u8 = 314159;
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const negative_eleven: u8 = -11;
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// There are no errors in the next line, just explanation:
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// Perhaps you noticed before that the print function takes two
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// parameters. Now it will make more sense: the first parameter
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// is a string. The string may contain placeholders '{}', and the
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// second parameter is an "anonymous list literal" (don't worry
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// about this for now!) with the values to be printed.
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std.debug.print("{} {} {}\n", .{ n, pi, negative_eleven });
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}
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