thaveethu gce - 2 years ago 48

Java Question

What is the time complexity of the following snippet? and could you explain it?

`for(int i=0;i<n;i++){`

for(int j=0;j<=i;j++){

//print something

}

}

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Answer Source

The outer loop has `n`

iterations.

The inner loop has `i+1`

iterations for each iteration of the outer loop.

Therefore the total number of iteration of the inner loop is:

1 + 2 + 3 + ... + n

which is equal to

```
n*(n+1)
-------
2
```

This is `O(n^2)`

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