C Tutorial

C Tutorial C Language Environment Setup Execution flow of C program C printf and Scanf C Data type C Token Variable in C Operators in C Comments in C Escape Sequence in C C – Storage Classes C Decision control statement Loop Statement in C Break, continue and goto statement in C Type Casting in C Function in C Recursion in C String in C C Array Pointer in C Dynamic memory allocation C –Structure Nested Structure in C Union in C File Handling in C C pre-processor Static Function In C Sizeof In C Selection Sort In C Scope Of Variables In C Runtime Vs Compile Time In C Random Access Lseek In C Queue Implementation In C Pseudo Code In C Prototype In C Pointer To Pointer In C Pointer Arithmetic In C Passing Array To Function In C Null Character In C Merge Sort In C Macros In C Library Functions In C Memory Leak In C Int In C Goto And Labels In C Fibonacci Series In C Fflush In C Derived Data Types In C Data Types In C Const Vs Volatile In C Character Set In C Character Class Tests In C Calloc In C C Pointers Arrays In C Include In C Clrscr In C C Vs Java String Literals In C Types Of Pointers In C Variables In C Volatile In C Why C Is A Middle Level Language Infix To Postfix Program In C Ceil function in C LCM of two numbers in C Quick sort in C Static in C function pointer as argument in C Top Array Keywords in C Add two numbers using the function in C Armstrong program in C using function Array, Declaring Arrays and Array Initialization Limitations of Inline Function in C Merge and Merge sort with example in C Do-While Loop in C For Loop in C While-Loop in C Difference between while and do-while loop in C Array Of Structures in C Data Structures And Algorithms in C Types Of Structures In C How to Avoid Structure Padding in C Use of Structure in C Do WHILE LOOP in C Programming Examples For Loop in C Programming Examples Entry Control Loop in C Exit control loop in C Infinite loop in C Nested loop in C pow() function in C String Handling functions in C

C printf and Scanf

Input-Output functions in C Programming

In C Language, the printf() and scanf() are inbuilt library functions that used for input and output. It is defined in the header file“<stdio.h>”. printf() Function: In C programming language, printf() function is used to print the values. The values may be character, string,float,integer etc. We can use different types of format specifier to display the value of the program.
Format Specifier Description
%d It is used to print the value of integer variable.
%s It is used to print the value of string variable.
%c It is used to print the value of single character variable.
%f It is used to print the value of float variable.
%lf It is used to print the value of double variable.
%x It is used to print the octal value of integer variable.
%o It is used to print the hexadecimal value of integer variable.
\n It is used to break the new line.
Note:  C language is the case sensitive. All characters in printf() and scanf() functions must be in lower case.
Example of printf() function:
#include <stdio.h>
void main()
int a= 5;
char ch='A';
float f=7.9;
char str[20]="Hello-world";
printf("Integer Value of a: %d \n",a );
printf("single char value of ch:%c\n",ch);
printf("Float Value of f: %f \n",f);
printf("string value str: %s\n",str);

scanf() Function: In C program, scanf() function is used to read character,  string, numeric data from the keyboard.
#include <stdio.h>
int main()
int a;
char str[20];
printf("Enter integer value :");
printf("Enter sring value between[1-20] :");
printf("The value of A %d: \n",a);
printf("The string value of str : %s \n",str);