You may notice that we used %d to print integer number but %f for fraction. This is called format specifier in C. There are different format specifier to print different data type. List of most used format specifier and example are given below:

Data type Format specifier Example
int %d or %i 
#include<stdio.h>
int main()
{
    int variable;
    variable=25;
    printf("%d",variable);
    printf("%i",variable);
    return 0;
}
long int %ld 
#include<stdio.h>
int main()
{
    long int variable;
    variable=25;
    printf("%ld",variable);
    return 0;
}
float %f 
#include<stdio.h>
int main()
{
    float variable;
    variable=25.26;
    printf("%f",variable);
    return 0;
}
double %lf 
#include<stdio.h> 
int main()
{
    double variable;
    variable=25.365;
    printf("%lf",variable);
    return 0;
}
char %c 
#include<stdio.h> 
int main()
{
    char variable;
    variable='A';
    printf("%c",variable);
    return 0;
}
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