add string

Author: geekysrm

06-types-string.md

@@ -0,0 +1,98 @@
+### String
+
+-   used for holding text
+    
+-   3 ways to create strings:
+    
+    1.  using single quotes:
+        
+        `const first = 'Soumya';`
+        
+    2.  using double quotes:
+        
+        `const middle = "Ranjan";`
+        
+    3.  using backticks:
+        
+        ```javascript
+         	const last = `Mohanty`;
+        
+        ```
+        
+-   single quotes and double quotes are the same thing.
+    
+    used for: `"she's cool"`
+    
+    or escaping: `'she\\'s cool'`
+    
+-   backticks:
+    
+    ```javascript
+      const sentence = `she's so "cool"`;
+      console.log(sentence); // she's so "cool"
+    
+    ```
+    
+-   Multi-line string:
+    
+    ```javascript
+      const song = 'Oh \\
+      I like \\
+      pizza';
+      
+      console.log(song); // Oh I like pizza
+    
+    ```
+    
+    ```javascript
+      const song = `Oh
+      I like
+      pizza`;
+      
+      console.log(song); 
+      /*
+      Oh
+      I like
+      pizza
+      */
+    
+    ```
+    
+    2nd one using backticks is mostly used.
+    
+-   **String concatenation and interpolation**
+    
+    -   '+' is used for **concatenation**. It is also used for adding 2 nos.
+    -   **Concatenation**: when 2 or more strings combined to one
+    -   **Interpolation**: when you put a variable inside a string
+    -   Example 1:
+    
+    `const name = 'Soumya';`
+    
+    `const hello = 'Hello my name is ' + name + '. Nice to meet you.'`
+    
+    _(can use double or single quotes)_
+    
+    -   Example 2:
+        
+       ` 1+1 // 2`
+
+	 `'1'+'1' // 11 `
+
+	`1 + '1' // 11`
+        
+    -   Example 3:
+        
+        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.
+        
+    -   Backticks also used for _tagged template literals_.
+        
+    -   Backticks are helpful for creating HTML:
+        
+        ```javascript
+          const html = `
+          	<div>
+          		<h2>Hey everyone! I am ${name}.</h2>
+          	</div>
+          `;
+        ```