Which statement is used to perform a loop over an internal table in ABAP?

The statement used to perform a loop over an internal table in ABAP is the LOOP…ENDLOOP construct. This is a specialized looping structure designed specifically for iterating through internal tables in ABAP.

When using this construct, you can access each entry of the internal table sequentially, allowing for operations such as reading or modifying the data within the table. Inside the LOOP block, you can reference the current row being processed using the system field SY-TABIX, which indicates the index of the current entry.

Additionally, LOOP…ENDLOOP supports a range of options, such as processing based on specified conditions or iterating over a specified range of rows, making it versatile for different looping requirements within the context of ABAP development.

The other looping constructs, such as WHILE…ENDWHILE and REPEAT…ENDREPEAT, have their own unique uses for scenarios where the number of iterations is not strictly determined by an internal table. The FOR…END construct does not exist in ABAP in the context of looping over internal tables as it does in some other programming languages. Hence, utilizing LOOP…ENDLOOP is the most appropriate method for this specific task in ABAP.