Watch is data ripe in c program

Answer 1

u mean all of the data types in the c?
int The integer number
float The fractional number
double The fractional number of increased precision
char The any symbol
void The empty type(do not return any)

if you don't understand the difference between float and double, then look this
float example : 23.0000
double example : 23.00000000

also C has modifiers:
long
short
signed
unsigned