Introduction to arithmetic operations

Opening a text editor

Creating two variables

Adding Integers

Explanation of the asterisk symbol

The expr command

How to display mathematical expressions on screen?

Using reverse quotes

Explanation of modular division

Conclusion

What is expr command

Multiplying expressions

Reminder operators

Logical OR Operator

Operators in expr command

Calculate word length

Substring positions

Advanced scripting example

Conclusion

Intro

Creating a shell script to perform floating point arithmetic

Creating variables

Explanation of the four expressions

How to get the pipe symbol

How to pass an expression to a program

Assigning outputs to variables

Running the script

Recap of what we did in this tutorial

Conclusion

Intro

Simple Examples

Multiplication

Boolean calculations

Comparisons

Conclusion

Outro

Intro

How to perform arithmetic operations in shell script

1-What is bash script?

2-What are the advantages of using bash scripts?

3-Mention the disadvantages of bash scripts?

4-What types of variables are used in bash?

5-How to declare and delete variables in bash?

7-How can you combine strings in a bash script?

8-Which commands are used to print output in bash?

9-How to take input from the terminal in bash?

10-How to use command-line arguments in bash?

11-Is bash a weakly typed language? Why?

13-How to declare and access an array variable in bash?

14-How can conditional statements be used in bash?

15-How to compare values in bash?

16-Which conditional statement can be used as an alternative to if-elseif-else statements in bash?

17-What different types of loops can be used in bash?

19-How to cut and print some part of a string data in bash?

20-Mention some ways to perform arithmetic operations in bash?

21-How to check a directory exists or not using bash?

22-How can a bash script be terminated without executing all statements?

23-What are the uses of break and continue statements in bash?

25-Mention some options that are used to test files

26-What is meant by ‘bc’ and how can this command can be used in bash?

27-How can you print a particular line of a file in bash?

28-What is IFS?

30-How to run multiple bash script in parallel?

Intro

Declaring and initialising a control variable for the loop

Using the -ge Operator

Using the do and done keywords

Running the script

Summary of the script

Execution of the until loop

Conclusion

What is Shell?

Interpreted languages are executed line by line

Common shells

What is bash?

Comments in shell scripting

Quotation marks

Variable Rules

Extracting value from a variable

Taking user input for multiple variables

How to create a shell script

Introduction

Executing set command

How to see the number of parameters that have been set?

Saving the script file

Counting the number of files in a directory

Significance of the asterisk character

Conclusion

Introduction

Executing set command

How to see the number of parameters that have been set?

Saving the script file

Counting the number of files in a directory

Significance of the asterisk character

Conclusion

Demonstration

Extracting output from a file

Viewing positional parameters

Example of a shell script using positional parameters

Explanation of the sixth script file

How to use mv to rename a file

Recap of the program

Conclusion

Intro

How to perform arithmetic operations in shell script

Demonstration

Changing the default input stream from the keyboard to a text file

Saving the current terminal settings

Changing the input stream

Displaying line numbers

Incrementing the value of a variable

Restoring original settings

What happens when you don't type in any character?

Conclusion

What is Shell?

Interpreted languages are executed line by line

Common shells

What is bash?

Comments in shell scripting

Quotation marks

Variable Rules

Extracting value from a variable

Taking user input for multiple variables

How to create a shell script

Saving the current terminal settings

Initializing variables

Counting the number of lines

Implementing NOL

Using the set command to set positional parameters

Counting the number of sentences in a file

Outputting the number of lines and words

Changing the input speed back to the keyboard

Running the script

Conclusion

Basic Operators

Types of Operators

Arithmetic Operators

Examples

Relational Operators

Logical Negation

Or Operator

And and or Operators

String Operators

File Test Operators