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Merge pull request #264 from Arya-Elfren/float-clarification

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Clarify `f16` maths - closes #204
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Dave Gauer 2023-05-04 08:22:54 -04:00 committed by GitHub
commit 8345197f54
1 changed files with 11 additions and 8 deletions
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19
exercises/060_floats.zig
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@ -1,10 +1,11 @@
//
// Zig has support for IEEE-754 floating-point numbers in these
// specific sizes: f16, f32, f64, f80, and f128. Floating point
// literals may be written in scientific notation:
// literals may be written in the same ways as integers but also
// in scientific notation:
//
// const a1: f32 = 1200.0; // 1,200
// const a2: f32 = 1.2e+3; // 1,200
// const a1: f32 = 1200; // 1,200
// const a2: f32 = 1.2e+3; // 1,200
// const b1: f32 = -500_000.0; // -500,000
// const b2: f32 = -5.0e+5; // -500,000
//
@ -22,12 +23,14 @@
// const pi: f16 = 3.1415926535; // rounds to 3.140625
// const av: f16 = 6.02214076e+23; // Avogadro's inf(inity)!
//
// A float literal has a decimal point. When performing math
// operations with numeric literals, ensure the types match. Zig
// does not perform unsafe type coercions behind your back:
// When performing math operations with numeric literals, ensure
// the types match. Zig does not perform unsafe type coercions
// behind your back:
//
// var foo: f16 = 13.5 * 5; // ERROR!
// var foo: f16 = 13.5 * 5.0; // No problem, both are floats
// var foo: f16 = 5; // NO ERROR
//
// var foo: u16 = 5; // A literal of a different type
// var bar: f16 = foo; // ERROR
//
// Please fix the two float problems with this program and
// display the result as a whole number.