JavaScript Tutorial in Hindi #15 | Strings in JavaScript (2025)

1. What is a String in JavaScript?

A string is a sequence of characters used to represent text.

Example:

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let name = "Mohit";

**2. Declaring Strings using ' ', " ", and ` `

  1. 'Single Quotes'
  2. "Double Quotes"
  3. `Backticks` (Template Literals)

All three create strings. Use the one that fits your content best.

3. Difference Between Quotes and When to Use Which

  1. ' ' or " ": Regular strings.
  2. ` `: Template literals – allow multiline strings and embed variables using ${}.

✅ Use backticks ` when:

  1. You need variable insertion
  2. You want multiline strings

4. String Concatenation using + and Template Literals

Using +:

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let name = "Mohit";
let message = "Hello, " + name + "!";

Using Template Literals:

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let message = `Hello, ${name}!`;

✅ Template literals are cleaner and easier to read.

5. Dynamic String Insertion

You can insert variables or expressions directly using template literals:

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let product = "laptop";
let price = 50000;
let info = `The ${product} costs ₹${price}`;

6. Using Escape Characters (\n, \", \', \\)

CharacterMeaning
\nNew line
\'Single quote
\"Double quote
\\Backslash


Example:

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let str = "He said, \"Hello\"\nAnd left.";

7. Real-Life Examples with Template Literals

✅ Email Template:

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let user = "Mohit";
let msg = `Hi ${user},

Welcome to Mohit Decodes!
Have a great day!`;

console.log(msg);

✅ Bill Receipt:

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let item = "Coffee";
let price = 120;
let receipt = `You ordered: ${item}
Total: ₹${price}`;

console.log(receipt);