IF statement is used for creating a conditional control structure in ABAP programming. Normally two types of control structures are there in ABAP, One with IF statement and other with CASE statement.
IF statement can have a nested control structure by using several IF, ELSEIF statements inside an IF control block. IF control structure should always end with ENDIF statement. We can use any logic expressions along with IF statement (less than, greater than, equal to, true, false etc). If the condition with IF statement is true then the inside statements in IF block will execute, otherwise it will switch to next ELSE or ELSEIF or IF statement in the ABAP program.
IF <Logical Expression>
See a sample nested IF block
ELSEIF <condition 4>
By using ELSEIF statement we can avoid too much complex structure with IF statements inside an ELSE statement.
See a Sample ABAP program with IF statement
Also Read : View Other ABAP Keywords & Syntax -> ABAP Transaction codes