/*******
# This is a comment explaining the purpose of the following code
variable = 42 # This is another comment about the variable assignment
................…............................... ***********/
Different levels of indentation are used to:
1. **Comment the code:** Indentation is often used to visually separate comments from the actual code. Comments are annotations within the code that provide explanations or documentation for developers or readers. Proper indentation ensures that comments are distinct from the code and do not affect the program's functionality.
Example:
```python
# This is a comment explaining the purpose of the following code
variable = 42 # This is another comment about the variable assignment
```
2. **Show nested blocks:** Indentation is a fundamental aspect of programming languages that use block structures, like Python, JavaScript, or Ruby. Indentation visually represents nested blocks of code, such as loops, conditional statements, or function definitions. It helps programmers identify the scope and hierarchy of code blocks.
Example (Python):
```python
def print_numbers():
for i in range(5): # This is the outer loop
for j in range(i): # This is the inner loop, nested within the outer loop
print(j, end=' ')
print() # This is part of the outer loop
```
In this example, the indentation demonstrates the nesting of the inner loop within the outer loop. It helps to understand the flow of the code and the scope of each loop. Improper indentation in such cases can lead to syntax errors or incorrect program behavior.