How can I iterate over the characters in a string, and change them?

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I want to take a string, and change each character. I.e. A becomes E or F becomes C.

what I have is this:

function convert(){
  var text=document.getElementById('textInp').value;
  alert(text);
  for()
}

I don’t know what to do in the for loop

69 thoughts on “How can I iterate over the characters in a string, and change them?”

  1. use string length and iterate and replace whatever you want.

    for(let i = 0; i < yourstring.length; i++) {
    yourstring = yourstring.replace(yourstring[i],"yourvalue");
}
    Reply

  2. Try this split("") split the string with space .and match the letter then replace using map

    function convert(){
  var text=document.getElementById('textInp').value;
 console.log(text.split("").map(a=> a= a.toUpperCase() == 'A'? 'E':a.toUpperCase() == 'F'?'C':a ).join(""))
}
    <input id="textInp" value="AonFncdcd">
<button onclick="convert()">click</button>
    Reply

  3. You can split and join your String

    function convert(){
   var text = document.getElementById('textInp').value;
   alert(text);
   text = text.split('A').join('E').split("F").join("C");
}
    Reply

  4. There is a direct option to iterate over a string directly: to use for...of or for...in:

    function convert(){
  let text = document.getElementById('textInp').value;
  for(let i in text) {
    // Do something
    console.info('i:', i, ' char: ', text[i])
  }
}
    <input id="textInp" value="Your input">
<button onclick="convert()">click</button>
    Reply

  5. You can iterate over each of the characters in the text like this

    for (var x = 0; x < text.length; x++)
{
    var c = text.charAt(x);
    //Add code here to do the translation
}
    Reply

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