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Practical-20

Write a program using pointer to determine the length of a character string.​

Introduction

In this program, we will learn to write a program using pointer to determine the length of a character string.

Algorithm

  1. Start
  2. Declare a string pointer.
  3. Declare a length variable.
  4. Input the string.
  5. Scan the string.
  6. Run a loop till the last character of the string.
  7. Print the length of the string.
  8. End

Code

Practical-20.c

#include<stdio.h>  // header file

void main(){  //function start

  char* str;  //declare string pointer
  int len=0;  //declare length

  printf("Enter the string:");  //Inputiing the string
  scanf("%s",str);  //scanning the string

  while(*str){  //will run till last character of string
    len++;  //incrementing length
    str++;  //incrementing pointer
  }
  printf("Length of the string is %d\n",len);  //printing length
    //ending main function
}

Output

Enter the string:Hello
Length of the string is 5
Explanation

In this program, we have declared a string pointer and a length variable. Then we have inputted the string and scanned it. Then we have run a loop till the last character of the string. In the loop, we have incremented the length and the pointer. Then we have printed the length of the string.

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