Printing variables

Using printf function, we can print the value of a variable.

In order to print the variable value, we must instruct the printf function the following details,

1.specify the format of variable.

2.variable name which we want to print.

Basic format specifiers in C

Format Specifier	Data Type	description	Syntax
%d	int	To print the integer value	printf("%d",<int_variable>);
%f	float	To print the floating number	printf("%f",<float_variable>);
%lf	double	To print the double precision floating number or long float	printf("%lf",<double_variable>);
%c	char	To print the character value	printf("%c",<char_variable>);

Example

#include<stdio.h>

int main()
{
    int  i = 10;
    char c = 'a';

    printf("Value of i = %d\n",i);
    printf("Value of c = %c\n",c);

    return 0;
}

Some other format specifiers also available in C. We will discuss about it, when it needed.

Multiple format specifiers in same printf

we can use many format specifiers in the same printf function.

How it works?

if printf encounter any format specifier first time, it will take the first variable after the comma "," and print it. Next time, It will take the second variable after the comma and print it and so on.

Example

Pictorial Explanation

Example

#include<stdio.h>

int main()
{
    int age = 10;
    char initial = 'A';
    float weight = 25.5;

    printf("age is \t %d\n",age);
    printf("initial is \t %c\n",initial);
    printf("weight is \t %f\n",weight);

    //or we can print everything on the same line

    printf("age=%d \t initial=%c \t weight=%f\n",age,initial,weight);

    return 0;
}

Useful Resources

https://en.wikipedia.org/wiki/Printf_format_string