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Program to find the length of the string

Write a program that takes a string as input and find the length of the string.

Program in C

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

int main() {
    char input[100];

    printf("Enter a string: ");
    fgets(input, sizeof(input), stdin);

    // Remove trailing newline character
    input[strcspn(input, "\n")] = '\0';

    int length = strlen(input);
    printf("Length of the string: %d\n", length);

    return 0;


  • In this program:
  • We declare a character array input to store the user’s input string.
  • The fgets function is used to read the user’s input, with a limit on the input length to prevent buffer overflow.
  • We remove the trailing newline character from the input string using strcspn function.
  • The strlen function is used to find the length of the input string.
  • Finally, the length of the string is printed to the console.


Enter a string:
Length of the string: 17

Program in Java

import java.util.Scanner;

public class StringLength {
    public static void main(String[] args) {
        String input;

        Scanner scanner = new Scanner(;

        System.out.print("Enter a string: ");
        input = scanner.nextLine();

        // Remove trailing newline character
        input = input.trim();

        int length = input.length();
        System.out.println("Length of the string: " + length);


  1. import java.util.Scanner;: This line imports the Scanner class from the java.util package. It is used for reading user input.
  2. public class StringLength: This line declares a public class named StringLength.
  3. public static void main(String[] args): This is the main method that serves as the entry point of the program.
  4. String input;: This line declares a string variable named input to store the user input.
  5. Scanner scanner = new Scanner(;: Creates a new Scanner object named scanner to read user input from the console.
  6. System.out.print(“Enter a string: “);: Prints a prompt message to enter a string.
  7. input = scanner.nextLine();: Reads the input string using scanner.nextLine().
  8. input = input.trim();: Removes leading and trailing whitespace from the input string using the trim() method.
  9. int length = input.length();: Retrieves the length of the input string using the length() method.
  10. System.out.println(“Length of the string: ” + length);: Prints the length of the string.
Enter a string:
Length of the string: 17