Question

How to calculate power for large numbers in Rust

Answer 1

use num_bigint::BigInt;

fn calculate_large_numbers_power(base: i64, exponent: i64) -> BigInt {
    let base_big = BigInt::from(base);

    base_big.pow(exponent as u32)
}

fn main() {
    for &n in &[15, 100] {
        let power = calculate_large_numbers_power(2, n);
        println!("2^{} = {}", n, power);
    }
}



    
/*
run:

2^15 = 32768
2^100 = 1267650600228229401496703205376
   
*/
  
 

 

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