Update Bash.md

sources/Misc/Bash.md

@@ -1 +1,30 @@
 Random bash tips and tricks to (_try to_) use Bash properly and efficiently...
+
+# Loops
+
+To iterate over a sequence of numbers:
+
+1. With a know fixed upper limit
+    ```bash
+    for i in {1..5}; do
+        echo $i;
+    done
+    ```
+
+2. With a possibly unknown upper limit
+    ```bash
+    END=5
+    for i in $(seq 1 $END); do
+        echo $i;
+    done
+    ```
+
+3. If `seq` can't be used
+    ```bash
+    END=5
+    for ((i=1;i<=END;i++)); do
+        echo $i
+    done
+    ```
+
+[\[ref\]](https://stackoverflow.com/questions/169511/how-do-i-iterate-over-a-range-of-numbers-defined-by-variables-in-bash)