Reading into multiple variables in Bash Scripting

Introduction

Reading into multiple variables lets you get several pieces of information from one input line easily.

When you want to get a user's first and last name separately from one input.

When reading multiple values from a file line by line.

When you want to split a sentence into words and store them in different variables.

When you need to process command output that returns multiple values on one line.

Syntax

Bash Scripting

read var1 var2 var3 ...

Each word from the input is assigned to the variables in order.

If there are more words than variables, the last variable gets all remaining words.

Examples

Reads two words from input and stores them in firstName and lastName.

Bash Scripting

read firstName lastName

Reads three words from input and stores them in a, b, and c respectively.

Bash Scripting

read a b c

If input has more words than variables, last variable gets the rest.

Bash Scripting

read x y
# Input: hello world from bash
# x=hello, y='world from bash'

Sample Program

This script asks for your first and last name, reads them into two variables, and then greets you.

Bash Scripting

#!/bin/bash

echo "Enter your first and last name:"
read firstName lastName

echo "Hello, $firstName $lastName!"

Important Notes

If you press Enter without typing anything, variables will be empty.

You can use the -p option with read to prompt on the same line: read -p "Enter name: " first last

Use quotes around variables when using them to avoid word splitting issues.

Summary

Use read with multiple variable names to split input into parts.

The last variable gets all leftover input if there are more words than variables.

This helps handle multiple inputs easily in scripts.