C++ Program to Find Length of String Without Using Library Function

Here you will get C++ program to find length of a string without using library function.

We iterate through the string until null character ‘\0’ is encountered and increase a counter variable for each iteration. Finally print the counter variable, it contains the length of string.

#include<iostream>
#include<stdio.h>

using namespace std;

int main()
{
	char a[30];
	int i;
	cout<<"Enter a string:";
	gets(a);
	
	for(i=0;a[i]!='\0';++i);
	
	cout<<"\nLength of the string '"<<a<<"' is "<<i;

	return 0;
}

#include<iostream>

#include<stdio.h>

using namespace std;

int main()

{

char a[30];

int i;

cout<<"Enter a string:";

gets(a);

for(i=0;a[i]!='\0';++i);

cout<<"\nLength of the string '"<<a<<"' is "<<i;

return 0;

}

Output

Enter a string:hello hi

Length of the string ‘hello hi’ is 8

C++ Program to Find Length of String Without Using Library Function

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