How to python round in Rust

The round() function in Python is used to round off a given number to a specified number of digits. It takes two arguments, the first being the number to be rounded and the second being the number of digits to round to. If the second argument is not provided, the function rounds the number to the nearest integer. The function uses the standard rounding rules, where numbers ending in 5 are rounded up if the preceding digit is odd and rounded down if the preceding digit is even. The function returns a float if the second argument is provided, otherwise it returns an integer. Keep reading below to learn how to python round in Rust.

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Python ’round’ in Rust With Example Code

Python’s built-in `round()` function is a convenient way to round numbers to a specified number of decimal places. Rust, being a statically-typed language, does not have a built-in `round()` function. However, Rust’s standard library provides the `f64::round()` method for floating-point numbers.

To use `f64::round()`, simply call it on a floating-point number and pass in the number of decimal places to round to as an argument. For example, to round the number `3.14159` to two decimal places, you would use the following code:

let num = 3.14159; let rounded_num = num.round() * 100.0 / 100.0;

In this example, we first call `round()` on `num` to round it to the nearest whole number. We then multiply the result by `100.0` to move the decimal point two places to the right, effectively rounding to two decimal places. Finally, we divide by `100.0` to move the decimal point back to its original position.

If you need to round to a specific number of decimal places other than two, simply adjust the multiplication and division factors accordingly.

While Rust’s `f64::round()` method may not be as convenient as Python’s built-in `round()` function, it provides a simple and straightforward way to round floating-point numbers in Rust.

Equivalent of Python round in Rust

In conclusion, the Rust programming language provides a similar function to Python’s round() function called roundf(). This function allows developers to round floating-point numbers to the nearest integer or to a specified number of decimal places. Additionally, Rust’s roundf() function provides more control over rounding behavior by allowing developers to specify rounding modes. Overall, Rust’s roundf() function is a powerful tool for developers who need to perform rounding operations in their code. With its precision and flexibility, Rust is a great choice for developers who want to build high-performance applications that require accurate and efficient rounding operations.