diff --git a/Programming_Languages/Shell/Strings_in_bash.md b/Programming_Languages/Shell/Strings_in_bash.md
new file mode 100644
index 0000000..4867361
--- /dev/null
+++ b/Programming_Languages/Shell/Strings_in_bash.md
@@ -0,0 +1,30 @@
+---
+categories:
+  - Programming Languages
+tags:
+  - shell
+  - data-types
+---
+
+# Strings in bash
+
+## Return a substring by index
+
+```bash
+myString="hello"
+substring=${myString:0:3}
+# hel
+```
+
+This is often used when looping through each character in a string.
+
+## Loop through each character in a string
+
+```bash
+str="hallelujah"
+stringLength=$(expr length str)
+
+for (( i=0; i<=${stringLength}; i++ )); do
+    echo "${str:$i:1}"
+done
+```
diff --git a/Programming_Languages/Shell/Substrings_in_Bash.md b/Programming_Languages/Shell/Substrings_in_Bash.md
new file mode 100644
index 0000000..1cc1449
--- /dev/null
+++ b/Programming_Languages/Shell/Substrings_in_Bash.md
@@ -0,0 +1,10 @@
+---
+categories:
+  - Programming Languages
+tags:
+  - shell
+
+---
+
+# Substrings in Bash
+