Simple data types

• Integers: i8⮳, i16⮳, i32⮳, i64⮳, i128⮳, isize⮳
• Unsigned: u8⮳, u16⮳, u32⮳, u128⮳, usize⮳
  • usize⮳ and isize⮳ are 32 or 64 bits, depending on the architecture of the computer.
• Floating point: f32⮳, f64⮳
• Boolean: bool⮳: true, false
• Char: let z: char = 'ℤ'; Unicode
• Tuples: let tup: (i32, f64, u8) = (500, 6.4, 1);
  • Access via let five_hundred = x.0;
  • Destructuring via let (x, y, z) = tup;
• Arrays: let a: [i32; 5] = [1, 2, 3, 4, 5]; allocated on the stack. access via let first = a[0];
  • A vector is a similar collection type provided by the standard library that is allowed to grow or shrink in size
• Unit (aka void): ()
• Type aliases: type Kilometers = i32;

Handle overflows

• Wrap in all modes with the wrapping_* methods, such as wrapping_add⮳.
• Return the std::option::Option::None⮳ value if there is overflow with the checked_* methods.
• Return the value and a boolean indicating whether there was overflow with the overflowing_* methods.
• Saturate at the value’s minimum or maximum values with the saturating_* methods.