Here we will see the way of using Loops in bash or shell script

As we all knows In computer programming, a loop is a sequence of instructions that is continually repeated until a certain condition is reached.

For loop syntax

for (( initializer; condition; step ))
do
   statement      
done

While loop syntax

while [ condition ]
do
 statement
done

Until Loop syntax

until [ condition ]
do
  statement
done

Execution

$ ./loop.sh 

Output

1
2
3
4
5
6
7
8
9
10
For Loop
1
2
3
4
5
6
7
8
9
10
Sum of all digits
Enter a number: 443
Sum=11
Largest of n nubmers
How many numbers: 5
Enter Numbers
23
4
5123
432
4
Max number is 5123
0
1
2
3
4
5
6
7
8
9
10

Hope this may help you.