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--- a/bash.md

+++ b/bash.md

		@@ -199,6 +199,19 @@ comment
199	199
200	200	\| `${#FOO}` \| Length of `$FOO` \|
201	201
	202	+### Manipulation
	203	+
	204	+```bash
	205	+STR="HELLO WORLD!"
	206	+echo ${STR,} #=> "hELLO WORLD!" (lowercase 1st letter)
	207	+echo ${STR,,} #=> "hello world!" (all lowercase)
	208	+
	209	+STR="hello world!"
	210	+echo ${STR^} #=> "Hello world!" (uppercase 1st letter)
	211	+echo ${STR^^} #=> "HELLO WORLD!" (all uppercase)
	212	+```
	213	+
	214	+
202	215	### Default values
203	216
204	217	\| `${FOO:-val}` \| `$FOO`, or `val` if not set \|