Avoid Single-Letter Variable Names

WarningClean ABAP & Modern Syntax#EC NO_SINGLE_LETTERRemote Enabled

Overview

Avoid single-letter variable names.

ATC Finding Message: Avoid single-letter variable names; use descriptive identifiers

Rationale

Single-letter variables (e.g. i, x, lv_i, ls_x) obscure the meaning of code, make text searching difficult, and increase cognitive load. Use intention-revealing names such as index, customer, or total_amount.

Non-Compliant

DATA i TYPE i.
DATA lv_i TYPE i.

Compliant

DATA line_index TYPE i.
DATA count TYPE i.

Configuration & Thresholds

This check can be fine-tuned directly in the ATC Check Variant Editor (CHKV) in Eclipse ADT:

Parameter Name	Data Type	Default Value	Description & Guidance
MIN_NAME_LEN	Integer	2	Minimum allowable identifier length (default: 2, excludes i, j, x, y loop indices)

Suppression

To suppress findings for this rule, append the pseudo-comment to the statement:

" Standard pseudo-comment:
... "#EC NO_SINGLE_LETTER

" SAP CI_ prefix format:
... "#EC CI_NO_SINGLE_LETTER

Related Rules

• Prefer FINAL( ) over DATA( ) when the variable is never written again — #EC PREF_FINAL_DATA
• Enforce Local Variable and Field-Symbol Naming Conventions — #EC PREF_NAMING_VARS
• Avoid Variable Scope Leaking from Inner Blocks — #EC NO_SCOPE_LEAK

Technical Details

• Native ATC Class: ZCL_SKYLINT_NO_SINGLE_LETTER
• Implementation File: zcl_skylint_no_single_letter.clas.abap