Example
I F ·
··
·
··THEN
1
00
I F ······T H
EN
GOTO
or
I
F··
·
···GOTO
I
F·
··
···THEN
PR
I N T
or
I
F····
··
THEN
?
I F ·····
·T
H
EN
A =
5*7
assignment
I F
··
····
THEN
1
=1
0
:0=5
0
I
F···
··
·THEN
INPU
T
I
F······THEN
READ
I
F·
··· ··
THEN
GO
SUB
I F······T
HE
N
R
ET
URN
I
F··
··
··T
H
EN
S T
OP
I F ····· ·
THEN
E
ND
Examples
of
logical and relational expressions
-~
"'
"'
Q)
~
Q)
Oil
Operator
>
<
Sample application
-
Explanation
I F
A=
X T H E N
··
·
If
the value
of
numeric variable A equals the
value
of
X, execute the statements following
THEN.
IF
A$
= "
XYZ
"
T
HEN···
IF
A>X
THEN···
IF
A<X
TH
EN·
··
If
the
contents
of
string variable A$ equal
"XYZ",
execute the statements following
THEN.
If
·the value
of
variable A is greater
than
X,
execute the statements following THEN.
§
<>
or
><
~
IF
A<>X
THEN···
If
the value
of
variable A is less
then
X, execute
the
. statements following THEN.
If
the value
of
variable A
is
not
equal
to
X,
execute the statements following THEN.
~
> =
or=
>
I F
A>
= X
THEN···
If
the value
of
variable A
is
greater
th
an or
eq
ual
to
X, execute the statements following
THEN.
< =
or
= < I F
A<
= X
THEN···
If
the value
of
variable A
is
less
than
or equal to
X, execute the statements following THEN.
*
+
I
FCA
>X)*CB>Y)
T
HEN··
·
I
FCA>X)
+
CB>Y)
THEN··
·
If
the value
of
variable A is greater
than
X_and
the
value
of
variable B
is
greater
than
Y, execute
the
statements following THEN.
If
the value
of
variable A is greater
than
X or
the
value
of
variable B
is
greater
than
Y, execu
te
the
stat
e
ments
following THEN.
------
--------
----------------------
----------------
----------
--------
--51
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