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## How do you do multiplication on Linux?

We are using the Ubuntu command line, the Terminal, in order to perform all the mathematical operations. You can open the Terminal either through the system Dash or the Ctrl+Alt+T shortcut.

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Arithmetic.

+, – | Addition, subtraction |
---|---|

*, / , % | Multiplication, division, remainder |

** | Exponent value |

## How do you multiply two numbers in a shell?

The following is the shell script to multiply two numbers:

- echo enter a and b.
- read a b.
- c=`expr $a * $b`
- echo $c.

## How do you multiply numbers in bash?

Shell script for multiplication of two numbers

- initialize two variables.
- multiply two numbers directly using $(…) or by using external program expr.
- Echo the final result.

## How do you multiply with expr?

To multiply using expr command use the * operator. The following example will do multiplication by using the * operator with expr command.

## How can I add two numbers in shell script?

Use the following syntax to calculate the sum of two integers in a shell script:

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

## How do you split two numbers in Unix?

Shell script for division of two numbers

- initialize two variables.
- divide two numbers directly using $(…) or by using external program expr.
- Echo the final result.

## How do I use bash expr?

To use the “expr” command for addition, you must add “+” between the integer values. The “expr” command will calculate the sum 23 of both values 14 and 9. “/” sign between the values along with the “expr” keyword. We got “5” as a resultant value.

## How do I write an if statement in bash?

The if elif else statement in bash scripts allows creating conditional cases and responses to specific code results.

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Bash if Statement Syntax.

Syntax | What it is | When to use |
---|---|---|

if [[ <commands> ]] | Bash extension, an advanced version of single square brackets. | String matching a wildcard pattern. |

## How do you split a shell script?

The following arithmetic operators are supported by Bourne Shell.

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Unix / Linux – Shell Arithmetic Operators Example.

Operator | Description | Example |
---|---|---|

/ (Division) | Divides left hand operand by right hand operand | `expr $b / $a` will give 2 |

## Which command is used to multiply numbers?

The MUL command is used to multiply two numbers.

## How do you do multiplication in CMD?

echo Press 2 for Subtraction. echo Press 3 for Multiplication. echo Press 4 for Division.

## What is expr in shell?

The expr command in Unix evaluates a given expression and displays its corresponding output. It is used for: Basic operations like addition, subtraction, multiplication, division, and modulus on integers. Evaluating regular expressions, string operations like substring, length of strings etc.

## What is $$ in bash?

The $$ is the process id of the shell in which your script is running. For more details, see the man page for sh or bash. The man pages can be found be either using a command line “man sh”, or by searching the web for “shell manpage”

## What is read command in Linux?

read command in Linux system is used to read from a file descriptor. Basically, this command read up the total number of bytes from the specified file descriptor into the buffer. If the number or count is zero then this command may detect the errors. But on success, it returns the number of bytes read.