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'.

SEE ALSO

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

USAGE

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

Where:

1. <EXP> is an expression
2. <LC> is a logical comparator. The following comparators are allowed:

EQ    Equal

NE    Not equal

GT    Greater

GE    Greater/equal

LT    Less

LE    Less/equal

3. <N> is a label, with <N> assuming any value between 1 and 99.]

NOTES

1. Examples:

   IF([loop].GE.15) GOTO LB9

   IF ([xsize].LT.[ysize]) GOTO LB12

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

SUBROUTINES

LOGIFQ

CALLER

SPIDER