Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Difference between strlen() and sizeof() for string in C
strlen()
The function strlen() is a predefined function in C language. This is declared in “string.h” header file. It is used to get the length of array or string.
Here is the syntax of strlen() in C language,
size_t strlen(const char *string);
Here,
string − The string whose length is to be calculated.
Here is an example of strlen() in C language,
Example
#include <stdio.h>
#include <string.h>
int main () {
char s1[10] = "Hello";
int len ;
len = strlen(s1);
printf("Length of string s1 : %d
", len );
return 0;
}Output
Length of string s1 : 10
In the above example, a char type array s1 is initialized with a string and a variable len is stroing the length of s1.
char s1[10] = "Hello"; int len ; len = strlen(s1);
sizeof()
The function sizeof() is a unary operator in C language and used to get the size of any type of data in bytes.
Here is the syntax of sizeof() in C language,
sizeof( type );
Here,
type − Any type or data type or variable, you want to calculate the size of.
Here is an example of sizeof() in C language,
Example
#include <stdio.h>
int main() {
int a = 16;
printf("Size of variable a : %d
",sizeof(a));
printf("Size of int data type : %d
",sizeof(int));
printf("Size of char data type : %d
",sizeof(char));
printf("Size of float data type : %d
",sizeof(float));
printf("Size of double data type : %d
",sizeof(double));
return 0;
}Output
Size of variable a : 4 Size of int data type : 4 Size of char data type : 1 Size of float data type : 4 Size of double data type : 8
Updated on: 26-Jun-2020
722 Views
Advertisements