What is the B ig - O complexity class

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What is the Big - O complexity class of each code fragment?

Explain why. The complexity for “sequence1” is O(1), “ seq uence2” is O(n), and “ condition ” is O(1).

for (int j=1; j<n; j=j*2) {
   sequence1
}

I thought the question already says it is O(1), or is there are difference between Big-O complexity and 'the complexity'?

asked 1 min ago

user3718503

1