String length - C Programming - consider the string "c programming" it's length is 13. Null character is not counted when calculating string length.
This program prints length of string, for example consider the string “c programming” it’s length is 13. Null character is not counted when calculating string length. To find length of string we use strlen function of string.h.
C program to find string length
#include <stdio.h>
#include <string.h>
int main()
{
char a[100];
int length;
printf("Enter a string to calculate it's length\n");
gets(a);
length = strlen(a);
printf("Length of entered string is = %d\n",length);
return 0;
}
C program to find string length without strlen
You can also find length of string without strlen function. We create our own function to find length of string.
#include <stdio.h>
int string_length(char []);
int main()
{
char s[1000];
int length;
printf("Input a string\n");
gets(s);
length = string_length(s);
printf("Length of \"%s\" = %d\n", s, length);
return 0;
}
int string_length(char s[]) {
int c = 0;
while (s[c] != '\0')
c++;
return c;
}
Function to find string length using pointers
int string_length(char *s) {
int c = 0;
while(*(s+c))
c++;
return c;
}
