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 understand the algorithm carefully. Then study the program line-by-line and compare it with the output. Finally, review the explanation section to strengthen your logic and programming understanding.
Rewrite the program without looking at the code. Modify values, conditions or logic and run it again. This helps improve confidence and strengthens coding skills much faster.