Computer Science » C Program » Hello, World!
Definition :
Here you will learn, How to print “Hello, World!” on the screen in C programming.
Image :
Program :
#include<stdio.h>
int main()
{
printf("Hello, World!");
return 0;
}Output :
Hello, World!
Explanation :
1. The #include is a preprocessor command that tells the compiler to include the contents of stdio.h (standard input and output) file in the program.
2. The stdio.h file contains functions such as scanf() and printf() to take input and display output respectively. In the above Hello, World! program we are using printf() function.
3. If you use the printf() function without writing #include <stdio.h> , the program will not compile.
4. Here main() is the function name and int is the return type of this function. The execution of a C program starts from the main() function. The main function is a part of every ‘C’ program. We can represent the main function in various forms, such as:
- main()
- int main()
- void main()
- main(void)
- void main(void)
- int main(void)
5. printf() is a library function to send formatted output to the screen. In this program, printf() displays Hello, World! text on the screen within double quotes.
6. The return 0; statement is the “Exit status” of the program. In simple terms, the program ends with this statement. The value 0 means successful execution of main() function.
Related Posts
Computer Science » C Program » 1-10 Numbers in Pyramid Program : [php]#include<stdio.h> int main() { int i, j; int count = 1; for (i = 0; i <= 4; i++) { printf("n"); for (j = 0; j < i; j++) { printf("%dt", count); count++; } } return(0); }[/php] Output : [php]1 2 3 4 5 6 7 8 9 10 [/php]- Computer Science » C Program » Inverted Pyramid Program : [php]#include<stdio.h> int main() { int i, j; char ch = '*'; for (i = 4; i >= 0; i--) { printf("n"); for (j = 0; j < i; j++) printf("%c", ch); } return(0); }[/php] Output : [php]**** *** ** *[/php]
- Computer Science » C Program » Program to Print All ASCII Value Program : [php]#include<stdio.h> int main() { int i = 0; char ch; for (i = 0; i < 256; i++) { printf("%c ", ch); ch = ch + 1; }[/php] Output : [php]Å É æ Æ ô ö ò û ù ÿ Ö Ü ¢ £ ¥ ₧ ƒ á í ó ú ñ Ñ ª º ¿ ⌐ ¬ ½ ¼ ¡ « » ░ ▒ ▓ │ ┤ ╡ ╢ ╖ ╕ ╣ ║ ╗ ╝ ╜ ╛ ┐ └ ┴ ┬ ├ ─ ┼ ╞ ╟ ╚ ╔ ╩ ╦ ╠ ═ ╬ ╧ ╨ ╤ ╥ ╙ ╘ ╒ ╓ ╫ ╪ ┘ ┌ █ ▄ ▌ ▐ ▀ α ß Γ π Σ σ µ τ Φ Θ Ω δ ∞ φ ε ∩ ≡ ± ≥ ≤ ⌠ ⌡ ÷ ≈ ° ∙ · √ ⁿ ² ■ ☺ ☻ ♥ ♦ ♣ ♠ ♫ ☼ ► ◄ ↕ ‼ ¶ § ▬ ↨ ↑ ↓ ← ∟ ↔ ▲ ▼ ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 6…
- Computer Science » C Program » Even Number Pyramid Program : [php]#include<stdio.h> int main() { int i, j, num = 2; for (i = 0; i < 4; i++) { num = 2; for (j = 0; j <= i; j++) { printf("%dt", num); num = num + 2; } printf("n"); } return (0); }[/php] Output : [php]2 2 4 2 4 6 2 4 6 8 [/php]
- Computer Science » C Program » Reverse a Given Number Program : [php]#include<stdio.h> int main() { int num, rem, rev = 0; printf("nEnter any number to be reversed : "); scanf("%d", &num); while (num >= 1) { rem = num % 10; rev = rev * 10 + rem; num = num / 10; } printf("nReversed Number : %d", rev); return (0); }[/php] Output : [php]Enter any number to be reversed : 123 Reversed Number : 321[/php]