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In C programming, console input and output are handled
using the scanf() and printf() functions.
scanf() is used to get input from the user,
while printf() is used to display output on the
console.
Arithmetic Operators and Variables
C supports several arithmetic operators such
as + , - , * , / , and % .
Variables are used to store data in a C program. A
variable must be declared before it can be used. The
declaration specifies the type of data that the variable
will hold.
Conditional Statements
Conditional statements are used to execute different
blocks of code based on whether a certain condition is
true or false.
The if , else if , and else statements are used to
accomplish this in C.
Loops and Iteration
Loops are used to execute a block of code multiple
times.
There are several types of loops in C,
including for , while , and do-while loops.
Functions and Recursion
, Functions are reusable blocks of code that perform a
specific task.
In C, functions are defined using
the funciton keyword.
Recursion is a technique in which a function calls itself
repeatedly until a certain condition is met.
Data Structures and File Handling
Data structures are used to organize and store data in a
C program.
File handling is the process of reading from and writing
to files in a C program.
In C, files are handled using
the FILE and fopen() functions.
2.Console Input and Output in C
Programming
The Basics of C Programming topic covers the following:
Console Input and Output
In C programming, console input and output refer to the
process of reading data from the keyboard (input) and
displaying data on the screen (output). The following are
the basic functions used in console input and output:
Console Input
scanf() : reads formatted data from the keyboard and
stores it in a variable.
gets() : reads a line of text from the keyboard until a
newline character is encountered.
Console Output
, printf() : displays formatted data on the screen.
puts() : displays a line of text on the screen until a
newline character is encountered.
Examples
#include <stdio.h>
int main() {
int age;
char name[50];
printf("Enter your name: ");
scanf("%s", name);
printf("Enter your age: ");
scanf("%d", &age);
printf("\nHello, %s! You are %d years old.\
n", name, age);
return 0;
}
In this example, the scanf() function is used to read the
name and age of the user from the keyboard, and
the printf() function is used to display a greeting
message.
#include <stdio.h>
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