How do you find complexity of algorithms? Explain

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Time complexity of an algorithm signifies the total time required by the program to run till its completion.

The time complexity of algorithms is most commonly expressed using the big O notation. It’s an asymptotic notation to represent the time complexity.

Calculating Time Complexity:

Now the most common metric for calculating time complexity is Big O notation. This removes all constant factors so that the running time can be estimated in relation to N, as N approaches infinity.

Let take and example:

int sum(int A[], int n){
int sum = 0, i;
for(i = 0; i < n; i++)
sum = sum + A[i];
return sum;
}

For the above code, time complexity can be calculated as follows…

The time complexity of above program is 4n + 4