C Program to Find Length of String with using user defined function

With using User-defined Function Write a Program to Find Length of String

#include<stdio.h>

// Prototype Declaration
int FindLength(char str[]);

int main() {
   char str[100];
   int length;

   printf("\nEnter the String : ");
   gets(str);

   length = FindLength(str);

   printf("\nLength of the String is : %d", length);
   return(0);
}

int FindLength(char str[]) {
   int len = 0;
   while (str[len] != '\0')
      len++;
   return (len);
}

#include<stdio.h>

// Prototype Declaration

int FindLength(char str[]);

int main() {

char str[100];

int length;

printf("\nEnter the String : ");

gets(str);

length = FindLength(str);

printf("\nLength of the String is : %d", length);

return(0);

}

int FindLength(char str[]) {

int len = 0;

while (str[len] != '\0')

len++;

return (len);

}

Explanation of the program –

after accepting the string from the user we are passing the complete array to the function.

length = FindLength(str);

1	length = FindLength(str);

Now inside the function we are executing a while loop which will calculate the length of the string.

while (str[len] != '\0')
    len++;

1 2	while (str[len] != '\0') len++;

Dry run and more detail explanation of this while loop is already explained in the previous chapter.

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