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A file is a collection of bytes stored on a secondary storage device, which is generally a disk of some kind. The collection of bytes may be interpreted, for example, as characetrs, words, lines, paragraphs and pages from a textual document; fields and records belonging to a database; or pixels from a graphical image. [...]

Character type array is called string. All strings end with the NULL character. Use the %s placeholder in the printf() function to display string values.
Declaration:
char name[50];
Example

#include <stdio.h>
void main (void )
{
char *st1 = "abcd";
char st2[] = "efgh";
printf( "%s\n", s1);
[...]

Function is a block of statements which perform some specific task and always return single value to the calling function. Functions are used to minimize the repetition of code.
Some languages distinguish between functions which return variables and those which don’t. C assumes that every function will return a value. If the programmer wants a [...]

It is necessary to be careful of the meaning of such expressions as a + b * c
We may want the effect as either
(a + b) * c
or
a + (b * c)
All operators have a priority, and high priority operators are evaluated before lower priority ones. Operators of the same priority are evaluated from [...]

C has the following simple data types:

C type
Size (bytes)
Lower bound
Upper bound

Char
1
—–
——

Unsigned char
1
0
[...]

Here is your first c program. Write carefully because C Language is a case sensative language.

#include < stdio.h>
void main()
 
{
printf("Hello World\n");
}

Press ALT+F9 to compile your program. If you have any error in your program, you will get the message, remove your errors and then execute your program you will got the out [...]

A C program basically has the following form:
• Preprocessor Commands
• Type definitions
• Function prototypes — declare function types and variables passed to function.
• Variables
• Functions
We must have a main() function.
A function has the form:

type function_name (parameters)
{
local variables
 
C Statements
 
}

If the type definition is omitted C assumes that function returns an integer type. NOTE: This can be [...]