Implementation
Rust

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Be useful.

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Please try to avoid dependencies to third-party libraries and frameworks.

Other implementations
import java.util.Scanner;
Scanner in = new Scanner(System.in);
n = in.nextInt();
read(n);
my $n = <> + 0;  # read a line from STDIN, add 0 to convert to int
#include <stdio.h>
#include <stdlib.h>
char inbuff[1000];

if (!fgets(inbuff, sizeof(inbuff), stdin))
   fabort("Can't read from input");
int n = atoi(inbuff);
printf("You entered %d\n", n);
#include <iostream>
std::cin >> n;
import std.stdio;
readf("%d", &n);
n <- (read :: String -> Int) <$> getContents
fscanf(STDIN, "%d\n", $n);
import "fmt"
_, err := fmt.Scan(&n)
input_var = int(raw_input("Input Prompting String: "))
n = gets.to_i
n = io.read("n")
n = String.to_integer IO.gets ""
import "fmt"
_, err := fmt.Scanf("%d", &n)
use std::io;
let mut input = String::new();
io::stdin().read_line(&mut input).unwrap();
let n: i32 = input.trim().parse().unwrap();
const {createInterface} = require('readline')

const rl = createInterface ({
  input: process.stdin,
  output: process.stdout
})

rl.question('Input an integer: ', response => {
  let n = parseInt (response)
  // stuff to be done with n goes here

  rl.close()
})