for i in {1..5}
do
echo "Welcome $i times"
done
#!/bin/bash
# A simple bash "for loop" example below...
# This loop will run 4 times, and will echo the number in sequence as it goes.
# 3 is increment size
# Mind the double . between the {}
# Note how the variable is called with the $ prefix, which can be done within the "" quotes!
for i in {1..12..3}
do
echo "This is loop number $i"
done
# Result :
# This is loop number 1
# This is loop number 4
# This is loop number 7
# This is loop number 10
for i in {1..10} ; do ... ; done
years=(2018 2019)
days=(74 274)
for year in "${years[@]}"; do
for day in $(seq -w ${days[0]} ${days[1]}); do
echo $year
echo $day
done
done
for ((i = 1; i <= 10 ; i++)); do
echo $i
done
#!bin/bash
for i in {1..5}
do
echo i:$i
done
for VARIABLE in 1 2 3 4 5 .. N
do
command1
command2
commandN
done
for i in `seq 1 10`
do
echo $i #Do something here.
done
for VARIABLE in file1 file2 file3
do
command1 on $VARIABLE
command2
commandN
done
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
while [ <some test> ]
do
<commands>
done
for i in `seq 0 2 10`; do echo $i; done
for FILE in $(ls -A); do la $FILE; done
for <item> in <list of items>
do
<command to run>
done
#!/bin/bash
for i in {1..5}
do
echo "Welcome $i times"
done