Begins an IF construct.
Syntax
[construct-name :] IF (logical-expression) THEN |
- construct-name
is the name given to the IF
construct. If construct-name is specified,
the same name must also appear in the END IF
statement.
- logical-expression
is a scalar logical expression.
Description
The IF
statement executes the immediately following statement block if
logical-expression evaluates to true.
The IF
construct, which the IF
statement begins, may include ELSE IF
statements and an ELSE
statement to provide alternate statement blocks for execution.
The block following the IF
statement may be empty.
As an extension, HP Fortran 90 allows the transfer of control
into an IF construct
from outside the construct.
Examples
IF (x <= 0.0 .AND. y > 1.0) THEN
CALL fix_coord(x, y)
END IF |
Related statements
ELSE, ELSE IF,
IF (arithmetic),
IF (logical),
and END (construct)
Related concepts
For information about the IF
construct, see “IF construct”.
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