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| -rw-r--r-- | bash.html.markdown | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/bash.html.markdown b/bash.html.markdown index 81f85d28..4c50c653 100644 --- a/bash.html.markdown +++ b/bash.html.markdown @@ -65,7 +65,8 @@ echo ${VARIABLE:0:LENGTH} # Default value for variable echo ${FOO:-"DefaultValueIfFOOIsMissingOrEmpty"} -# This works for null (FOO=), empty string (FOO=""), zero (FOO=0) returns 0 +# This works for null (FOO=) and empty string (FOO=""); zero (FOO=0) returns 0. +# Note that it only returns default value and doesn't change variable value. # Builtin variables: # There are some useful builtin variables, like |