How do I compare two numbers in Unix?

How do you compare numbers in Unix?

Compare Numbers in Linux Shell Script

  1. num1 -eq num2 check if 1st number is equal to 2nd number.
  2. num1 -ge num2 checks if 1st number is greater than or equal to 2nd number.
  3. num1 -gt num2 checks if 1st number is greater than 2nd number.
  4. num1 -le num2 checks if 1st number is less than or equal to 2nd number.

How do you compare two variables in Unix?

$X = $Y is parsed as a shell command, meaning $X is interpreted as a command name (provided that the value of the variable is a single word). You can use the [ command (also available as test ) or the [[ … ]] special syntax to compare two variables.

How do I compare two numbers in bash?

Example: Comparing numbers in bash

Find out if 5 greater than 10, enter (type command at terminal): x=5 y=10 [ $x -gt $y ] echo $? In a bash shell non-zero output means false result i.e. $x is not greater than $y. Try the following example (type command at terminal):

How do I compare 2 numbers in awk?

Comparison operators in Awk are used to compare the value of numbers or strings and they include the following:

  1. > – greater than.
  2. < – less than.
  3. >= – greater than or equal to.
  4. <= – less than or equal to.
  5. == – equal to.
  6. != …
  7. some_value ~ / pattern/ – true if some_value matches pattern.
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What is the correct comparison statement in Linux?

Comparison Operators

When comparing strings in Bash you can use the following operators: string1 = string2 and string1 == string2 – The equality operator returns true if the operands are equal. Use the = operator with the test [ command. Use the == operator with the [[ command for pattern matching.

What is the purpose of in Unix?

Unix is an operating system. It supports multitasking and multi-user functionality. Unix is most widely used in all forms of computing systems such as desktop, laptop, and servers. On Unix, there is a Graphical user interface similar to windows that support easy navigation and support environment.

How do you input in Linux?

Example 1:

  1. #!/bin/bash.
  2. # Read the user input.
  3. echo “Enter the user name: “
  4. read first_name.
  5. echo “The Current User Name is $first_name”
  6. echo.
  7. echo “Enter other users’names: “
  8. read name1 name2 name3.

How do you declare a variable in Shell?

Unix / Linux – Using Shell Variables

  1. Defining Variables. Variables are defined as follows − variable_name=variable_value. …
  2. Accessing Values. To access the value stored in a variable, prefix its name with the dollar sign ($) − …
  3. Read-only Variables. …
  4. Unsetting Variables.

How do I add two numbers in Bash?

Bash – Adding Two Numbers

  1. Using expr command with quotes sum=`expr $num1 + $num2`
  2. Use expr command inclosed with brackets and start with dollar symbol. sum=$(expr $num1 + $num2)
  3. This is my preferred way to directly with the shell. sum=$(($num1 + $num2))

How do Bash scripts work?

A Bash script is a plain text file which contains a series of commands. These commands are a mixture of commands we would normally type ouselves on the command line (such as ls or cp for example) and commands we could type on the command line but generally wouldn’t (you’ll discover these over the next few pages).

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