Literals and operators
Integers 1, floats 1.2, characters 'a', strings "abc", booleans true
and the unit type () can be expressed using literals.
Integers can, alternatively, be expressed using hexadecimal, octal or binary
notation using these prefixes respectively: 0x, 0o or 0b.
Underscores can be inserted in numeric literals to improve readability, e.g.
1_000 is the same as 1000, and 0.000_001 is the same as 0.000001.
Rust also supports scientific E-notation, e.g. 1e6, 7.6e-4. The
associated type is f64.
We need to tell the compiler the type of the literals we use. For now,
we'll use the u32 suffix to indicate that the literal is an unsigned 32-bit
integer, and the i32 suffix to indicate that it's a signed 32-bit integer.
The operators available and their precedence in Rust are similar to other C-like languages.
fn main() { // Integer addition println!("1 + 2 = {}", 1u32 + 2); // Integer subtraction println!("1 - 2 = {}", 1i32 - 2); // TODO ^ Try changing `1i32` to `1u32` to see why the type is important // Scientific notation println!("1e4 is {}, -2.5e-3 is {}", 1e4, -2.5e-3); // Short-circuiting boolean logic println!("true AND false is {}", true && false); println!("true OR false is {}", true || false); println!("NOT true is {}", !true); // Bitwise operations println!("0011 AND 0101 is {:04b}", 0b0011u32 & 0b0101); println!("0011 OR 0101 is {:04b}", 0b0011u32 | 0b0101); println!("0011 XOR 0101 is {:04b}", 0b0011u32 ^ 0b0101); println!("1 << 5 is {}", 1u32 << 5); println!("0x80 >> 2 is 0x{:x}", 0x80u32 >> 2); // Use underscores to improve readability! println!("One million is written as {}", 1_000_000u32); }