[ASSIGNMENT] Remove All Characters from Input

Question

Task: You need to create a program that takes user input in form of string containing numbers. Then, remove all the characters from that input.

Input: solo56learn
Output: 56

Input: Program2018
Output: 2018

You can use any language to perform this task.

I already posted this challenge to Lesson Factory.
https://code.sololearn.com/cfFiXFsr3lI2/?ref=app

Answer 1

regular expressions are cool i guess
https://code.sololearn.com/cIvM06xcutkb/?ref=app

Answer 2

🇳🇬Brains 's answer can be futher simplified as :
alert(prompt().replace(/\D/g,""))

Answer 3

var str=prompt();
str=str.split("");
str.forEach(v=>{
if(v!=/^[a-zA-Z]+$/)
str.splice(v,1);
});
str=str.join("");

Answer 4

My try with Java;: 😄💚
https://code.sololearn.com/clSYJHPI4ojz/?ref=app

Answer 5

#Python
print(''.join([i for i in input() if i.isdigit()])