Bash Scripting 6

 Conditional Statement in Bash

Conditional statement :

• Conditional statement plays a vital role in programming.
• Every decision making part can be done with conditional statement.
• Conditional statement in bash is similar to python .But the coding style differ.
• Common conditional Statements are:
• if statement
• if-else statement
• if-elif-else statement
• switch cases
• These are the common conditional statement.
• Most of the popular programming language use these in the same format with slight modifications.

If else statement:

• Syntax:
  
  
  
• The if condition should be terminated with "fi" which is nothing but the reverse of "if".
• Lets see a example,
  
  

  

If-elif-else statement:

• Syntax:
  
• Example : find the largest of three number:

Case statement similar to switch statements:

• Syntax:
  
  
  
• Printing the numbers in letter format:
  
  
  
  
  
  
  
  
  
  
• In python we use break after each condition similarly here we use ";;"
• The case condition statement should end with "esac" which is the reverse of case.