Introduction to QBASIC
Control Statement
Branching Statement
Looping Statement
Library Function
Array in QBASIC
Modular Programming
File Handling
Introduction to QBASIC
Introduction to QBasic Elements of QBASIC Operators in QBASIC Qbasic Statements
Control Statement
Control Statements in QBASIC
Branching Statement
IF ... THEN Statement IF ... THEN .... ELSE Statement IF ... THEN ... ELSEIF Statement SELECT CASE Statement GOTO Statement
Looping Statement
Introduction FOR ... NEXT Loop WHILE .... WEND DO ... LOOP Nested Loop in QBASIC
Library Function
Library Function in QBASIC Mathematical Library Functions (QBASIC) String Library Functions (QBASIC)
Array in QBASIC
Array in QBASIC
Modular Programming
Concept of Modular Programming SUB Procedure (QBASIC) FUNCTION Procedure (QBASIC)
File Handling
File Handling (QBASIC)

Control Statements in QBASIC

Normally programs are executed from top to bottom, in the order that they are written. But sometime it is required to alter the flow of sequence of instructions in a the program. For that QBASIC provide some statements that can alter the flow of a sequence of instructions. The statement which alter and transfer the flow of program from one statement line to another are called control statements.

Mainly, there are two types of control statements in QBASIC. They are:

  1. Branching Statement
  2. Looping Statement
Branching Statement Looping Statement
IF ... THEN FOR .. NEXT
IF .. THEN ... ELSE WHILE ... WEND
IF ... THEN ... ELSE IF DO ... LOOP
SELECT ... CASE NESTED LOOP
GOTO  

Branching Statement also further divided into two types :

  1. Conditional Branching Statement
    • IF ... THEN
    • IF ... THEN ... ELSE
    • IF ... THEN ... ELSE IF
    • SELECT CASE
  2. Unconditional Branching Statement
    • GOTO

Note: There is only one unconditional branching statement in QBASIC Programming, that is GOTO statement


  8479