Program optimization

//Computational tasks can be performed in several different ways with 
//varying efficiency. 
//A more efficient version with equivalent functionality is known as a strength reduction. 
//For example, consider the following C code snippet whose intention is to 
//obtain the sum of all integers from 1 to N:
int i, sum = 0;
for (i = 1; i <= N; ++i) {
  sum += i;
}
printf("sum: %d\n", sum);
//This code can (assuming no arithmetic overflow) be rewritten using a mathematical formula like:
int sum = N * (1 + N) / 2;
printf("sum: %d\n", sum);

Source: en.wikipedia.org

Similar codes

1 vote211 views1 answer
C program structure
C
0 vote254 views1 answer
File "rs_to_open3d.py", line 19, in <module> point cloud = Point Cloud() NameError: name 'PointCloud' is not defined
C
0 vote202 views1 answer
Eliminare file in c
C
3 votes210 views1 answer
Circle around icon flutter
C
0 vote221 views1 answer
A program that reads words from a text file and displays all words in ascending alphabetical order
C
0 vote197 views2 answers
Boom miners zerg
C
0 vote206 views1 answer
Binary search tree of strings in c
C
3 votes227 views2 answers
Getchar in c
C
0 vote203 views1 answer
Yt-project annotate_scale
C
0 vote200 views1 answer
How tier lists work
C