Find Length of String in C++

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C++ program to Find Length of String

String Length is the number of character in the given String. For Example: String="India" this word have 5 characters also this is the size of string.

Find Length of String Without Using Library function

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

 void main()
  {
   int i,count=0;
   char ch[20];
   clrscr();
   cout<<"Enter any string: ";
   gets(ch);
   for(i=0;ch[i]!='\0';i++)
   {
   count++;
   }
   cout<<"String Length: "<<count;
   getch();
  }

Output

Enter any String: hitesh
String Length: 6

Explanation of Code

Here gets() is a predefined function in "conio.h" header file, It receive a set of character or String from keyboard.

Example

for(i=0;ch[i]!='\0';i++)
   {
   count++;
   }

Here we check the condition ch[i]!='\0' its means loop perform until string is not null, when it null loop will be terminate.

Find Length of String Using Library Function

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

 int main()
  {
   char str[20];
   int length;
   cout<<"Enter any string: ";
   gets(str);
   length = strlen(str);
   cout<<"String Length: "<<length;
   return 0;
}

Output

Enter any String: Kumar
String Length: 5

Explanation of Code

  • Here gets() is a predefined function in "conio.h" header file, It receive a set of character or String from keyboard.
  • strlen() is a predefined function in "conio.h" header file which return length of any string.

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