Question 244370 in Javascript Question posted in
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Why directly updating charater at index does not work in javascript

Can somebody explain this behaviour

Code:

name = "ABC"
console.log(name)

name[0] = "B"
console.log(name)

Output Expected:

ABC
BBC

Actual Output :
Actual Output

Tags:

2

Answers


  1. 0

    Strings are immutable/readonly due to the fact that they are primitive data types in JavaScript. You can only generate new strings.

    name = "ABC"
console.log(name)

name = "B" + name.slice(1);
console.log(name)

    To read more about primitives-MDN-Primitives

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  2. 0

    By creating a new string with the desired modification, you achieve the desired result while keeping the original name variable intact.

    let name = "ABC";
console.log(name);

name = "B" + name.substring(1); // Concatenate "B" with the rest of the string
console.log(name);
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