Brace expansion in shell
For example, printing sequences:
echo Number_{1..5}
echo Number_{1..5}
outputs:
Number_1 Number_2 Number_3 Number_4 Number_5
Number_1 Number_2 Number_3 Number_4 Number_5
Works with zero padding too:
echo {01..10}
# 01 02 03 04 05 06 07 08 09 10
echo {01..10}
# 01 02 03 04 05 06 07 08 09 10
You can also provide an increment value:
echo {0..15..2}
# 0 2 4 6 8 10 12 14
echo {0..15..2}
# 0 2 4 6 8 10 12 14
Also works with letters:
echo {Z..A}
echo {Z..A}
outputs:
Z Y X W V U T S R Q P O N M L K J I H G F E D C B A
Z Y X W V U T S R Q P O N M L K J I H G F E D C B A
A nested braces example:
echo a{A{1,2},B{3,4}}b
echo a{A{1,2},B{3,4}}b
outputs:
aA1b aA2b aB3b aB4b
aA1b aA2b aB3b aB4b