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 vote132 views1 answer
Dynamically create matrix c
C
2 votes133 views1 answer
C string is int
C
3 votes139 views1 answer
Circle around icon flutter
C
0 vote134 views1 answer
Reap zombie process in c
C
1 vote142 views1 answer
Imprimir valor no octave
C
7 votes108 views2 answers
How to press enter in selenium
C
0 vote140 views1 answer
Prime Number Check Program in C
C
0 vote142 views1 answer
Winautomation block input not working
C
0 vote134 views2 answers
Convert python to c
C
0 vote128 views1 answer
Arduino uno spi pins
C