IF_GOTO - Conditional jump (Scripting operation)

PURPOSE

To allow jumps to other locations in the command stream depending on the validity of equalities or inequalities. Modeled after the FORTRAN 'IF'.   Example.

SEE ALSO

IF	[Conditional expression execution (Scripting operation)]
IF_THEN	[Conditional execution of operations (Scripting operation)]
GOTO	[GOTO (Scripting operation)]
DO	[Start of a loop (Scripting operation)]

USAGE

.OPERATION: IF ( <EXP> <LC> <EXP> ) GOTO LB<N>

Where:

1. <EXP> is an expression
2. <N> is a label, with <N> assuming any value between 1 and 99.]
3. <LC> is a logical comparator. The following comparators are available:

Comparator	Alternate	Comparision
.EQ.	==	Equal to
.NE.	/=	Not equal to
.GT.	>	Greater than
.GE.	>=	Greater than or equal to
.LT.	<	Less than
.LE.	<=	Less than or equal to

NOTES

1. Examples:

   IF ([loop] >= 15) GOTO LB9

   IF ([xsize] < [ysize]) GOTO LB12

2. Only forward jumping is allowed. No jumping into a DO-loop.

SUBROUTINES

LOGIFQ

CALLER

SPIDER