Merge pull request #1079 from kryzhovnik/bash/string-substitution

Clear that length and position can be set by a variable in substring extraction

1 files changed, 2 insertions, 1 deletions

diff --git a/bash.html.markdown b/bash.html.markdown
index e0c12f97..81f85d28 100644
--- a/bash.html.markdown
+++ b/bash.html.markdown
@@ -59,7 +59,8 @@ echo ${VARIABLE/Some/A}
 # This will substitute the first occurance of "Some" with "A"
 
 # Substring from a variable
-echo ${VARIABLE:0:7}
+LENGTH=7
+echo ${VARIABLE:0:LENGTH}
 # This will return only the first 7 characters of the value
 
 # Default value for variable