How to Print "Hello World" and also write personal detail using "printf" in "C language"? 

this is very first program that programmer written in c language and this is very much easy you just use printf function and written what you want to write inside  double quotes ("-").
show source code below for better understanding 

SOURCE CODE:
#include <stdio.h>

int main()
{
    printf("Hello World");

    return 0;
}
OUTPUT:
Hello World
SOURCE CODE:
#include <stdio.h>
int main()
{
    printf("Name:________________\n");
    printf("Collage:________________\n");
    printf("Branch Name:_______________\n");
    printf("Subject:Fundamental of Computer Engineering\n");
    printf("Enrollment no:________________\n");
    printf("Grade:A\n");
    printf("Name:CGPA:8.5\n");
    return 0;
}
OUTPUT:
Name:________________
Collage:________________
Branch Name:_______________
Subject:Fundamental of Computer Engineering
Enrollment no:________________
Grade:A
Name:CGPA:8.5