Better readme.md

Author: HaryKali

__pycache__/basic.cpython-312.pyc

@@ -6,34 +6,162 @@ A simple programing language based on basic
 * Still working on it
 * Now is a simpile interpreter which support basic arithmetic operations
 
-## 1. Quick start
+## 1. Try ZeroLang in terminal
 
       python3 shell.py 
 
 
-## 2. functions
-* Support basic operations
-* Support variable definition
-* Support comparison operations
-* Support if statement
-* Support while and for
-* Support defined function and call function
-```
-  #for loop:
-  var res=0
-  for i=0 to 6 then var res=res+i
-  
-  #while loop:
-  var res=0
-  while res<10000 then var res=res+1
-  
-  #func
-  func add(a,b)-> a+b
-  add(a+b)
-  var sum=add(a+b)
-  
+## 🔤 Basic Elements
+
+### Variable Declaration
+
+Use the `var` keyword to declare a variable:
+
+```plaintext
+var x = 10
+```
+
+---
+
+### Number Types
+
+Supports both integers and floats:
+
+```plaintext
+x = 5
+y = 3.14
+```
+
+---
+
+### Operators
+
+#### Arithmetic Operators
+
+| Operator | Meaning | Example |
+| --- | --- | --- |
+| `+` | Addition | `2 + 3` |
+| `-` | Subtraction | `5 - 1` |
+| `*` | Multiplication | `4 * 2` |
+| `/` | Division | `10 / 2` |
+| `%` | Modulo | `7 % 3` |
+| `^` | Power | `2 ^ 3` |
+
+#### Comparison Operators
+
+| Operator | Meaning | Example |
+| --- | --- | --- |
+| `==` | Equals | `x == 5` |
+| `!=` | Not equals | `x != 0` |
+| `<` | Less than | `x < 10` |
+| `>` | Greater than | `x > 3` |
+| `<=` | Less than or equal | `x <= 5` |
+| `>=` | Greater or equal | `x >= 2` |
+
+#### Logical Operators
+
+| Keyword | Meaning | Example |
+| --- | --- | --- |
+| `and` | Logical AND | `x > 0 and y < 10` |
+| `or` | Logical OR | `x == 0 or y == 5` |
+| `not` | Logical NOT | `not x == 0` |
+
+---
+
+### Strings
+
+Defined using double quotes, with support for escape characters:
+
+```plaintext
+msg = "Hello\nWorld"
+```
+
+---
+
+### Lists
+
+Lists are enclosed in square brackets:
+
+```plaintext
+arr = [1, 2, 3]
+```
+
+- Access element: `arr / 1` → returns element at index 1
+- Remove element: `arr - 0` → removes element at index 0
+
+---
+
+## 🔁 Control Flow
+
+### If Expression
+
+```plaintext
+if x > 0 then "positive"
+elif x == 0 then "zero"
+else "negative"
+```
+
+---
+
+### For Loop
+
+```plaintext
+for i = 1 to 5 then i * 2
+```
+
+With optional step:
+
+```plaintext
+for i = 1 to 10 step 2 then i
 ```
 
+---
+
+### While Loop
+
+```plaintext
+while x < 5 then x = x + 1
+```
+
+---
+
+## 🧩 Functions
+
+### Define a Function
+
+```plaintext
+func add(a, b) -> a + b
+```
+
+### Anonymous Function
+
+```plaintext
+var square = func(x) -> x * x
+```
+
+### Function Call
+
+```plaintext
+add(2, 3)  # Returns 5
+```
+
+---
+
+## 🔍 Example Program
+
+```plaintext
+var square = func(x) -> x * x
+square(4)  
+```
+
+---
+
+## ⚠️ Error Handling
+
+Lexical and syntax errors are handled by classes like `IllegalCharError`, `InvalidSyntaxError`, and `RTError`. They provide clear messages with line numbers and context arrows.
+
+---
+