Rust for Python Developers - Unsigned, Signed Integers and Casting

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Rust signed two’s complement integer types

Now let’s compare negative numbers of signed two’s complement from the above table (from -1 to -7) to Rust’s signed integers.

fn main() {
    let i1:i32 = -1;
    let i2:i32 = -2;
    let i3:i32 = -3;
    let i4:i32 = -4;
    let i5:i32 = -5;
    let i6:i32 = -6;
    let i7:i32 = -7;
    println!("{} in binary is {:b}", i1, i1);
    println!("{} in binary is {:b}", i2, i2);
    println!("{} in binary is {:b}", i3, i3);
    println!("{} in binary is {:b}", i4, i4);
    println!("{} in binary is {:b}", i5, i5);
    println!("{} in binary is {:b}", i6, i6);
    println!("{} in binary is {:b}", i7, i7);
}

They are exactly the same except Rust uses the default 32-bit. Rust’s signed integer types are called the signed two’s complement integer types.

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Rust signed two’s complement integer types

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