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)

IF ... THEN Statement

It is the most simple form of the control statements which executes a block of statements only if the given expression or condition is true. If the condition is false, then the IF block will skipped and execution continues with the rest of the program.

Syntax: 

IF [conditional expression] THEN [statement block]
OR
IF [conditional expression] THEN
[statement]
END IF

Example: 1

CLS
INPUT "Enter your marks : "; m
IF m >= 35 THEN PRINT "You are passed !!"
IF m < 35 THEN PRINT "You are failed .."
END

Example: 1

CLS
INPUT "Enter a number "; n
IF n MOD 2 = 0 THEN PRINT "It is Even Number"
IF n MOD 2 = 1 THEN PRINT "It is Odd Number"
END

 


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