A day in class

One day in a particular school belonging to some obscure village in India,the maths teacher wanted to test the knowledge and wisdom of his students.All his students prepared really hard for the test.The question papers were distributed to the students.There was only one question surprisingly.The question was:-

1)Please arrive at the answer 1.

Ram wrote 1=1.

John wrote 1+1-1=1.

Ali wrote 10000-9999=1.

Joshua wrote 2-1=1.

Gautama wrote 0+1=1.

Singh wrote 1^2=1.

The teacher gave all of them full marks with a remark....there are infinite ways to get the answer 1,now that you have written an answer which you believe,accept the other ways of answering too!!!