Rust program to demonstrate the and_hms_milli(), and_hms_micro(), and and_hms_nano() functions

Rust | Date & Time Example: Write a program to demonstrate the and_hms_milli(), and_hms_micro(), and and_hms_nano() functions.
Submitted by Nidhi, on November 07, 2021

Problem Solution:

In this program, we will create date time objects using Utc.ymd(), and_hms_milli(), and_hms_micro(), and and_hms_nano() functions and print the date time.

Add Chrono date-time external library to your project

Create your project using the below command.
```
$cargo new datetime -bin
```
Goto the project folder cd datetime and edit Cargo.toml file.
```
$datetime>nano Cargo.toml
```
Then add dependency in Cargo.toml file
```
[dependencies]
chrono = "0.4"
```
After that, build your project using the below command
```
$datetime>cargo build
```
Then execute your project after modification in src/main.rs source file.
```
$datetime>cargo run
```

Program/Source Code:

The source code to demonstrate and_hms_milli(), and_hms_micro(), and and_hms_nano() functions is given below. The given program is compiled and executed on UBUNTU 18.04 successfully.

// Rust program to demonstrate and_hms_milli(), and_hms_micro(), 
// and and_hms_nano() functions

use chrono::prelude::*;

fn main() {
    let dt1 = Utc.ymd(2016, 10, 23).and_hms_milli(10, 12, 25,50);
    println!("Date time: {}", dt1);
    
    let dt2 = Utc.ymd(2016, 10, 23).and_hms_micro(10, 12, 25,50000);
    println!("Date time: {}", dt2);
    
    let dt3 = Utc.ymd(2016, 10, 23).and_hms_nano(10, 12, 25,50000000);
    println!("Date time: {}", dt3);
}

Output:

$datetime> cargo run
   Compiling datetime v0.1.0 (/home/arvind/Desktop/rust/datetime)
    Finished dev [unoptimized + debuginfo] target(s) in 0.29s
     Running `target/debug/datetime`

Date time: 2016-10-23 10:12:25.050 UTC
Date time: 2016-10-23 10:12:25.050 UTC
Date time: 2016-10-23 10:12:25.050 UTC

Explanation:

In the above program, we imported the "Chrono" library to our project for performing date and time operations. We imported the Chrono library using the below line:

use chrono::prelude::*;

In the main() function, we created date time objects using Utc.ymd(), and_hms_milli(), and_hms_micro(), and and_hms_nano() functions and printed the created objects.