Indians used violent as well as peaceful means of agitation against the British rulers. The Congress Party was the largest anti-British organization. Led by Gandhi ji, it used non-violence and satyagraha to press its demands for independence.
Not all the Indians believed in peaceful means, though. The Indian National Army was a military organization that actively fought against the British forces during the Second World War.
There were a lot of revolutionaries also who used bombs and weapons against the British. Some of them were grouped under the Hindustan Republican Army.