C Program to Count length of String

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Count Length of String Program in C

Count Length of String is nothing but just count number of character in the given String. For Example: String="India" in this string have 5 characters also this is the size of string.

Count length of string without using any library function.

Find length of string

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

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

Output

Enter any string: hitesh
Length of string: 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 string is null loop will be terminate.

Count length of string using library function

program to count length of string

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

void main()
 {
  char str[20];
  int length;
  clrscr();
  printf("Enter any string: ");
  gets(str);
  length = strlen(str);
  printf("Length of string: %d",length);
  getch();
}

Output

Enter any string: Kumar
Length of string: 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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