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HP OpenVMS DCL Dictionary
F$DELTA_TIME
Returns the time difference between a given start and end time. The end
time must be the same as or later than the start time.
Format
F$DELTA_TIME (start-time,end-time,format)
Return Value
A character string containing the difference between the start and end
times. The returned string has the following fixed format:
Argument
start-time
Absolute time expression of the start time in the following format:
end-time
Absolute time expression of the end time in the following format:
format
Format for delta time return value. The keywords are as follows:
- ASCTIM: ASCII time format
- DCL: DCL delta time format This format can be used as an input to
other DCL time-related lexicals and commands.
Example
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$ START=F$TIME()
$ END=F$TIME()
$ SHOW SYMBOL START
START = "15-JUL-2003 16:26:35.77"
$ SHOW SYMBOL END
END = "15-JUL-2003 16:26:41.39"
$ WRITE SYS$OUTPUT F$DELTA_TIME(START,END)
0 00:00:05.62
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This example uses the F$TIME() lexical function to define a symbol for
the start time and end time. It then uses F$DELTA_TIME to display the
time difference between the start and end time.
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$ WRITE SYS$OUTPUT F$DELTA_TIME(START,END,"DCL")
0-00:00:11.91
$ WRITE SYS$OUTPUT F$DELTA_TIME(START,END,"ASCTIM")
0 00:00:11.91
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This example returns the delta between the start and end time in DCL
and ASCII formats.
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WRITE SYS$OUTPUT F$DELTA_TIME ("BOOT", "LOGIN")
0 10:24:18.92
$ WRITE SYS$OUTPUT F$DELTA_TIME ("BOOT", "LOGIN", "DCL")
0-10:24:18.92
$ WRITE SYS$OUTPUT F$DELTA_TIME ("BOOT", "LOGIN", "ASCTIM")
0 10:24:18.92
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This example returns the delta between the boot and login time in DCL
and ASCII formats.
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