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IF ... THEN ... ELSE/ELSEIF...ENDIF Multi line IF Statement
Purpose:
To make a decision regarding program flow based on the result returned by an expression.
Syntax:
IF expression THEN
statement(s)
[ELSE
statement(s)]
[ENDIF]
IF expression THEN
statement(s)
[ELSEIF expression THEN
statement(s)]
[ENDIF]
Comments:
If the result of expression is nonzero (logical true), the statements after THEN are executed,
otherwise the statements after ELSE are executed.
THEN and ELSE may be followed by either a line number for branching, or one or more statements to
be executed.
Example:
In the following example, a test determines if N is greater than 10 and less than 20. If N is within this
range, execution branches to line 200. If N is not within this range, execution continues with line 110.
100 FOR A = 3 TO 7
110 PRINT A
120 IF A < 5 THEN
130 PRINT "A < 5"
140 ELSEIF A = 5 THEN
150 PRINT "A = 5"
160 ELSE
170 PRINT "A > 5"
180 ENDIF
190 NEXT