Summary - String basics
Build a greeting message combining strings, concatenation and template literals.
String basics recap
In this group you learned to create strings, use length and character access, concatenate with +, build template literals and use escape sequences.
A string is written with single or double quotes; "hello".length gives the character count and "hello"[0] the first character. The + operator joins two strings, and if one side is a number it converts it to a string.
Backticks and ${} give cleaner expression embedding. You write special characters with \n, \t and \\.
Exercise Build the greeting with +
Define firstName and lastName as strings ("Alex" and "Smith" for EN). Build greeting as firstName + " " + lastName. Log greeting with console.log.
Show example solution
const firstName = "Alex";
const lastName = "Smith";
const greeting = firstName + " " + lastName;
console.log(greeting);Exercise Build a two line receipt
Declare product as "Pen" and price as the number 12.5. Build receipt as a template literal with ${product} on the first line, then a \n escape, then ${price} lira on the second line. Log receipt with console.log.
Show example solution
const product = "Pen";
const price = 12.5;
const receipt = `${product}\n${price} lira`;
console.log(receipt);Test yourself
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Match each concept
- "str"
- Double quoted string
- str.length
- Character count
- a + b
- Concatenation
- `x ${y}`
- Template literal
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Which one allows expression interpolation?
- 'hello ${name}'
- `hello ${name}`
- "hello ${name}"
- [hello ${name}]
Show answer
`hello ${name}` — Correct. Only ${} inside backticks (a template literal) is evaluated.