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.launch is simply a roslaunch file. It is XML and specifies what nodes to launch and what parameters to assign to them.

.launch is simply a roslaunch roslaunch file. It is XML and an XM file which specifies what nodes to launch and what parameters to assign to them.them. It's an easy way to avoid typing "rosrun ... " over and over again when you need to launch many nodes in a particular system.

.launch is simply a roslaunch file. It is an XM XML file which specifies nodes to launch and parameters to assign to them. It's an easy way to avoid typing "rosrun ... " over and over again when you need to launch many nodes in a particular system.