Bash For Loop Example

Introduction:

for loop is one of the most used control flow statements in any scripting or programming language, if you want to do some task using bash shell that is repetitive, you can make use of for loop in bash, let's see some examples,

Syntax:

for variable_name in 1 2 3 4 .. n
do
  command/statement 1
  command/statement 2
  ...
  ...
 command/statement n
done

Example:

#!/bin/bash
#Mutiplication Table of Two

no=2

for num in 1 2 3 4 5 6 7 8 9 10
do
   echo $(($num*$no)) 
done

Example:

#!/bin/bash
#Mutiplication Table of Two

no=2

for num in {1..10}
do
   echo $(($num*$no)) 
done

Syntax:

for (( initializer; condition; step ))
do
     command/statement
     ...
     command/statement
done

Example:

#!/bin/bash
#Mutiplication Table of Two

no=2

for (( i=1; i<=10; i++ ))
do
  echo $(($i*$no)) 
done