|
| 1 | +### String |
| 2 | + |
| 3 | +- used for holding text |
| 4 | + |
| 5 | +- 3 ways to create strings: |
| 6 | + |
| 7 | + 1. using single quotes: |
| 8 | + |
| 9 | + `const first = 'Soumya';` |
| 10 | + |
| 11 | + 2. using double quotes: |
| 12 | + |
| 13 | + `const middle = "Ranjan";` |
| 14 | + |
| 15 | + 3. using backticks: |
| 16 | + |
| 17 | + ```javascript |
| 18 | + const last = `Mohanty`; |
| 19 | + |
| 20 | + ``` |
| 21 | + |
| 22 | +- single quotes and double quotes are the same thing. |
| 23 | + |
| 24 | + used for: `"she's cool"` |
| 25 | + |
| 26 | + or escaping: `'she\\'s cool'` |
| 27 | + |
| 28 | +- backticks: |
| 29 | + |
| 30 | + ```javascript |
| 31 | + const sentence = `she's so "cool"`; |
| 32 | + console.log(sentence); // she's so "cool" |
| 33 | + |
| 34 | + ``` |
| 35 | + |
| 36 | +- Multi-line string: |
| 37 | + |
| 38 | + ```javascript |
| 39 | + const song = 'Oh \\ |
| 40 | + I like \\ |
| 41 | + pizza'; |
| 42 | + |
| 43 | + console.log(song); // Oh I like pizza |
| 44 | + |
| 45 | + ``` |
| 46 | + |
| 47 | + ```javascript |
| 48 | + const song = `Oh |
| 49 | + I like |
| 50 | + pizza`; |
| 51 | + |
| 52 | + console.log(song); |
| 53 | + /* |
| 54 | + Oh |
| 55 | + I like |
| 56 | + pizza |
| 57 | + */ |
| 58 | + |
| 59 | + ``` |
| 60 | + |
| 61 | + 2nd one using backticks is mostly used. |
| 62 | + |
| 63 | +- **String concatenation and interpolation** |
| 64 | + |
| 65 | + - '+' is used for **concatenation**. It is also used for adding 2 nos. |
| 66 | + - **Concatenation**: when 2 or more strings combined to one |
| 67 | + - **Interpolation**: when you put a variable inside a string |
| 68 | + - Example 1: |
| 69 | + |
| 70 | + `const name = 'Soumya';` |
| 71 | + |
| 72 | + `const hello = 'Hello my name is ' + name + '. Nice to meet you.'` |
| 73 | + |
| 74 | + _(can use double or single quotes)_ |
| 75 | + |
| 76 | + - Example 2: |
| 77 | + |
| 78 | + ` 1+1 // 2` |
| 79 | + |
| 80 | + `'1'+'1' // 11 ` |
| 81 | + |
| 82 | + `1 + '1' // 11` |
| 83 | + |
| 84 | + - Example 3: |
| 85 | + |
| 86 | + const name = 'Soumya'; const hello = `Hello my name is ${name}. Nice to meet you. I am ${100+1} years old.`; console.log(hello); // Hello my name is Soumya. Nice to meet you. I am 101 years old. |
| 87 | + |
| 88 | + - Backticks also used for _tagged template literals_. |
| 89 | + |
| 90 | + - Backticks are helpful for creating HTML: |
| 91 | + |
| 92 | + ```javascript |
| 93 | + const html = ` |
| 94 | + <div> |
| 95 | + <h2>Hey everyone! I am ${name}.</h2> |
| 96 | + </div> |
| 97 | + `; |
| 98 | + ``` |
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