是否可以在 Rust 中打印用千位分隔符格式化的数字? [英] Is it possible to print a number formatted with thousand separator in Rust?

问题描述

例如

println!("{}", 10_000_000);

结果

10000000

而我想将其格式化为类似

whereas I'd like to format it to look something like

10,000,000

我浏览了fmt 模块文档，但没有什么可以涵盖这种特殊情况.我认为这样的事情会奏效

I went through the fmt module documentation, but there's nothing to cover this particular situation. I thought something like this would work

println!("{:,i}", 10_000_000);

但它抛出一个错误

invalid format string: expected `}`, found `,`

推荐答案

num_format crate 将为您解决这个问题.添加您的语言环境，它会发挥作用.

The num_format crate will solve this issue for you. Add your locale and it will do the magic.

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