Print and Scanf

Printf & Scanf

• printf() and scanf() functions are inbuilt library functions in C programming language which are available in C library by default. These functions are declared and related macros are defined in “stdio.h” which is a header file in C language.
• We have to include “stdio.h” file as shown in below C program to make use of these printf() and scanf() library functions in C language.

. PRINTF() FUNCTION IN C LANGUAGE:

• In C programming language, printf() function is used to print the “character, string, float, integer, octal and hexadecimal values” onto the output screen.
• We use printf() function with %d format specifier to display the value of an integer variable.
• Similarly %c is used to display character, %f for float variable, %s for string variable, %lf for double and %x for hexadecimal variable.
• To generate a newline,we use “\n” in C printf() statement.

C language is case sensitive. For example, printf() and scanf() are different from Printf() and Scanf(). All characters in printf() and scanf() functions must be in lower case.

EXAMPLE PROGRAM FOR C PRINTF() FUNCTION:

C

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#include <stdio.h> int main() {    char ch = 'A';    char str[20] = "Clanguage";    float flt = 10.234;    int no = 150;    double dbl = 20.123456;    printf("Character is %c \n", ch);    printf("String is %s \n" , str);    printf("Float value is %f \n", flt);    printf("Integer value is %d\n" , no);    printf("Double value is %lf \n", dbl);    printf("Octal value is %o \n", no);    printf("Hexadecimal value is %x \n", no);    return 0; }