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65 lines
2.2 KiB
Zig
65 lines
2.2 KiB
Zig
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//
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// The Zig language is in rapid development and continuously improves
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// the language constructs steadily.
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//
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// Since version 0.11, the "for-loops" widely used in other languages
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// such as C, e.g. "for (int i = 0; i < 10..." can now also be formed
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// similarly in Zig, which previously required a "while" construct.
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// Similar in this case actually means better, just as Zig generally
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// tries to make everything simple and "better".
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//
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// These new "for-loops" look like the following in Zig:
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//
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// for (0..10) |idx| {
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// // In this case 'idx' takes all values from 0 to 9.
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// }
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//
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// This is really simple and can replace the previous, somewhat bulky:
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//
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// var idx: usize = 0;
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// while (idx < 10) : (idx += 1) {
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// // Again, idx takes all values from 0 to 9.
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// }
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//
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// This would also simplify exercise 13, for example.
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// The best way to try this out is to use this exercise, which in the
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// original looks like this:
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//
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// ...
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// var n: u32 = 1;
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//
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// // I want to print every number between 1 and 20 that is NOT
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// // divisible by 3 or 5.
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// while (n <= 20) : (n += 1) {
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// // The '%' symbol is the "modulo" operator and it
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// // returns the remainder after division.
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// if (n % 3 == 0) continue;
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// if (n % 5 == 0) continue;
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// std.debug.print("{} ", .{n});
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// }
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// ...
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//
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const std = @import("std");
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// And now with the new "for-loop".
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pub fn main() void {
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// I want to print every number between 1 and 20 that is NOT
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// divisible by 3 or 5.
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for (???) |n| {
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// The '%' symbol is the "modulo" operator and it
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// returns the remainder after division.
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if (n % 3 == 0) continue;
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if (n % 5 == 0) continue;
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std.debug.print("{} ", .{n});
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}
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std.debug.print("\n", .{});
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}
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// Is actually a little easier. The interesting thing here is that the other
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// previous 'while' exercises (11,12, 14) cannot be simplified by this
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// new "for-loop". Therefore it is good to be able to use both variations
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// accordingly.
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