SHELL

bash for loop

for i in {1..10} ; do ... ; done

loop bash

years=(2018 2019)
days=(74 274)

for year in "${years[@]}"; do
    for day in $(seq -w ${days[0]} ${days[1]}); do
               echo $year
               echo $day
    done
done

bash for loop

for ((i = 1; i <= 10 ; i++)); do
  echo $i
done

bash for loop

#!bin/bash

for i in {1..5}
do
    echo i:$i
done

bash for i

for VARIABLE in 1 2 3 4 5 .. N
do
	command1
	command2
	commandN
done

bash for loop

for VARIABLE in file1 file2 file3
do
	command1 on $VARIABLE
	command2
	commandN
done

loop bash

Use for in bash for iterating words in a string or values in an array as:
for value in {1, 2, 3}; do echo $value; done
for value in $(cat arguments_files.txt); do [some_command]; done
And use while for iterating lines from a pipe output as:
cat arguments_file.txt | while read line; do [some_command]; done

bash for loop

for FILE in $(ls -A); do la $FILE; done

bash for

for var in value1 value2 value3
do
	command1 on $var
	command2
	commandN
done

bash for in loop

for <item> in <list of items>
do
    <command to run>
done

bash code for loop

#!/bin/bash
for i in {1..5}
do
   echo "Welcome $i times"
done