To understand this example, you should have the knowledge of the following C programming topics:
As you know, the best way to find the length of a string is by using the strlen() function. However, in this example, we will find the length of a string manually.
#include <stdio.h>
int main() {
char s[] = "Programming is fun";
int i;
for (i = 0; s[i] != '\0'; ++i);
printf("Length of the string: %d", i);
return 0;
}Length of the string: 18
Here, using a for loop, we have iterated over characters of the string from i = 0 to until '\0' (null character) is encountered. In each iteration, the value of i is increased by 1.
When the loop ends, the length of the string will be stored in the i variable.
First read the algorithm, then study the program code line by line. After that, compare the code with the output and finally go through the explanation. This approach helps learners understand both the logic and the implementation properly.
After understanding this example, try to rewrite the same program without looking at the code. Then change some values or logic and run it again. This helps improve confidence and keeps learners engaged on the page for longer.