Incremental number in shell script on each loop
You can use the post-increment operator:
(( P_CUST_ORDER_REF++ ))I recommend:
- habitually using lowercase or mixed case variable names to avoid potential name collision with shell or environment variables
- quoting all variables when they are expanded
- usually using
-rwith read to prevent backslashes from being interpreted as escapes - validating user input
For example:
#!/bin/bashis_pos_int () { [[ $1 =~ ^([1-9][0-9]*|0)$ ]]}echo "SCRIPT: $0"read -rp 'Enter Customer Order Ref (e.g. 100018)' p_cust_order_refis_pos_int "$p_cust_order_ref"read -rp 'Enter DU Id (e.g. 100018)' p_du_idis_pos_int "$p_dui_id"p_order_id=${p_cust_order_ref}${p_du_id}#Loop through all XML files in the current directoryfor f in *.xmldo (( p_cust_order_ref++ ))done