# usage: jjs secondssince.js

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// Number of seconds elapsed since the specified Instance #nashorn #javascript #java

// Input date and time in ISO 8601 format

// Example: 2001-01-01T00:00:00Z for 1 Jan 2001, 0 GMT

var Instant = java.time.Instant;

var ChronoUnit = java.time.temporal.ChronoUnit;

print("Enter date time:");

var sec = Instant.parse(readLine()).

      until(Instant.now(), ChronoUnit.SECONDS);

print(sec);