如何将数字加幂? [英] How to raise a number to a power?

问题描述

我试图使用尖号运算符(^)将整数提高到幂，但是得到的结果却令人惊讶，例如:

I was trying to raise an integer to a power using the caret operator (^), but I am getting surprising results, e.g.:

assert_eq!(2^10, 8);

在DuckDuckGo和Google上的搜索没有显示任何相关信息.

Searches on DuckDuckGo and Google didn't reveal anything about it.

如何在Rust中执行求幂运算?

How can I perform exponentiation in Rust?

推荐答案

插入符号运算符^不用于取幂，它是

The caret operator ^ is not used for exponentiation, it's the bitwise XOR operator.

Rust通过方法 pow 和<防止溢出的a href ="https://rust-num.github.io/num/num/pow/fn.checked_pow.html" rel ="noreferrer"> checked_pow .

Rust provides exponentiation via methods pow and checked_pow which guards against overflows.

因此，要将2提高到10的幂，请执行以下操作:

Thus, to raise 2 to the power of 10, do:

let base: i32 = 2; // an explicit type is required
assert_eq!(base.pow(10), 1024);

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