# You can iterate through a sequence of values by doing the following
for n in 1 2 3 4 5
do
    echo $n
done

# You can also iterate through an array variable, such as 'a', by doing the following
a=(2 "Hello" 44 552)

for i in "${a[@]}"
do
    echo $i
done

# You can generate a sequenced list and iterate through it as well
for i in {1..10..2}
do
    echo $i # Print "12345678910"
done

# You can use a Java-like for loop that uses the following format
#   (( initialEvent; comparison, operation ))
for (( a=0; a<10; a++ ))
do
    echo $a
done

# You can iterate through commands with the following
for i in pwd ls "ls /"
do
    $i # If a variable is just being accessed alone like this, then it is treated like a command
       # This is because Bash just drops in the value of 'i' before executing this line
done

# You can use wildcards to generate lists to iterate through file names
for fileName in *
do
    echo $fileName
done

# Iterate through all text file names
for fileName in *.txt
do
    echo $fileName
done