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Explain the 'strlen' function.

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Experienced Computer trainer having worked in IT sector for 20 years.

The strlen() function in C calculates the length of a given string. The strlen() function is defined in string.h header file. It doesn’t count the null character ‘\0’. // c program to demonstrate // example of strlen() function. #include <stdio.h> #include <string.h> int...
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The strlen() function in C calculates the length of a given string. The strlen() function is defined in string.h header file. It doesn’t count the null character ‘\0’.

// c program to demonstrate

// example of strlen() function.

#include <stdio.h>

#include <string.h>

int main()


    // defining string

    char str[] = "Hello";

    // getting length of str using strlen()

    int length = strlen(str);

    printf("Length of string is : %d", length);

    return 0;


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I have 10 years experience in teaching C, C++, Java, Python, tally, Ms-Excel, SQL.

to find the length of the given string strlen() It is used to returns the length of the string. x = strlen(“Welcome”) printf("%d",x); we can get the answer is 7

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