Referencing simulator state variables

Variable values may be referenced in simulator commands by preceding the variable name with a $ sign. For example, to use the now and resolution variables in an echo command type:

echo "The time is $now $resolution." 

Depending on the current simulator state, this command could result in:

The time is 12390 10ps. 

If you do not want the dollar sign to denote a simulator variable, precede it with a "\". For example, \$now will not be interpreted as the current simulator time.

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