indentation.md

Indentation

Basic of Indentation

indentation concepts which play a vital role in python app development

• One of the most distinctive features of Python is its use of indentation to mark blocks of code.
• Other some languages such as c and c++ uses curly braces({}) to differentiate block of code
• But in python, we use indentation to differentiate block of code (basically tab of some active space)
• we use a colon as the starting of code block and afterwords all code block will be placed.
• Leading whitespace (spaces and tabs) at the beginning of a logical line is used to compute the indentation level of the line, which in turn is used to determine the grouping of statements.
• A code block (body of a function, loop, etc.) starts with indentation and ends with the first unindented line.
• The amount of indentation is up to you, but it must be consistent throughout that block.

For example:

consider if loop In C Programing

if(conditions) {
   #main code
}

In python Programing:

With Brackets

if(conditions) :
    #Write Your Main Code Here

without Brackets

if conditions:
    #Write Your Main Code Here

How can we write code block in one line

• Indentation can be ignored in line with continuation.
• But it's a good idea to always indent. It makes the code more readable. Example: with Brackets

if(conditions) :#main code

Without Brackets

if conditions: #Write Your Main Code Here

If you give the wrong indentation which error will occurred

Consider following code block

if(1==1) :
              print("First line")
      print("second line")

Above Program Create Following Error

IndentationError: unindent does not match any outer indentation level

Correct Solution

if 1==1 :
  print("First line")
  print("second line")

Output

First line
second line