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What is the BITS constant in Rust?

okwudili onyejiaku

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

Overview

In Rust, we use the BITS constant to get the size of bits of an integer type. The integer here refers to both signed and unsigned datatypes.

Syntax

type::BITS
Syntax for BITS constant in Rust

Parameters

type: This represents the type of integer. It could be u32, u64, i8, and so on.

Return value

It returns a number representing the bit size of the integer type specified.

Example

fn main() {
  println!("{}", u32::BITS);
  println!("{}", u8::BITS);
  println!("{}", u16::BITS);
  println!("{}", u64::BITS);
  println!("{}", u128::BITS);
  println!("{}", i32::BITS);
  println!("{}", i8::BITS);
}
Get the bit size of integer types in Rust

Explanation

  • Lines 2–8: We use the BITS constant to get the number of bits some integer datatypes have. Next, we print the result to the console.

RELATED TAGS

rust
bits
communitycreator

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

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