next | previous | forward | backward | up | top | index | toc | Macaulay2 web site
Macaulay2Doc > The Macaulay2 language > packages > needsPackage(String)

needsPackage(String) -- load a package if not already loaded

Synopsis

Description

For example, to load the sample package FirstPackage:

i1 : notify = true

o1 = true
i2 : needsPackage "FirstPackage"
--database not present: /home/charles/local/src/Macaulay2/release-branches/1.5/M2/BUILD/boyd/builds.tmp/debian32/StagingArea/i386-Linux-Debian-6.0/lib/Macaulay2/i386-Linux-Debian-6.0/FirstPackage/cache/rawdocumentation-dcba-4.db
--beginDocumentation: reading the rest of /home/charles/local/src/Macaulay2/release-branches/1.5/M2/Macaulay2/packages/FirstPackage.m2
--package "FirstPackage" loaded
--loaded /home/charles/local/src/Macaulay2/release-branches/1.5/M2/Macaulay2/packages/FirstPackage.m2

o2 = FirstPackage

o2 : Package
i3 : needsPackage "FirstPackage"

o3 = FirstPackage

o3 : Package
The second time the package was not reloaded.

See also