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--- bash:strings:get_a_substring [2021/01/13 22:46] – peter
+++ bash:strings:get_a_substring [2021/01/13 22:56] (current) – peter
@@ Line 5: / Line 5: @@
 <code bash>
 ${var:start_position:length}
+</code>
+or
+<code bash>
+${var:start_position -length}
+</code>
+or
+<code bash>
+${var: -start_position -length}
+</code>
+or
+<code bash>
+${var: -start_position:length}
 </code>
@@ Line 24: / Line 42: @@
 <WRAP info>
-**NOTE:**  The number after the colon specifies the start position.
+**NOTE:**  A starting position of 0 this means start at the begin; and therefore returns everything.
-At starting position is 0 this means start at the begin; and therefore returns everything.
 </WRAP>
@@ Line 137: / Line 153: @@
 Be aware that if the length of any position is longer than the string, then nothing is returned.
 </WRAP>
+----
+===== Substrings with Concatenation =====
+<code bash>
+var="abcdefgh"
+echo ${var:0:(-1 -4)}XYZ
+</code>
+returns:
+<code bash>
+abcXYZ
+</code>
 ----