it is sqrt in header math.h
No commands in C; the name of function sqrt is sqrt (include math.h; and use -lm at linkage)
square root of c to the second power is c
#include<iostream> int main() { std::cout<<"The square root of 4 is "<<sqrt(4.0)<<std::endl; return(0); }
There are no commands in C-programming, you should use function sqrt from math.h
Sizeof is an example.
No.
-b + or - the square root on b squared - 4 times a times c over 2
This question is unclear.You could be asking for the square root of ( c5 )or alternatively for ( the square root of c )5Also are you intending for c to be as in the speed of light - if not, why not use x?
1. identifier 2. short for function
You write a function that evaluates the square root of its argument and returns the result to the caller.You can also use the run-time library functions in math.h ...double sqrt (double x);double pow (double x, (double) 0.5);
It's the same as the purpose of a function, procedure, method, ... in other programming languages. The basic idea is that you have a certain calculation or processing that has to be repeated over and over again (perhaps with slight variations), so it is programmed in a single place, where it can be invoked from different parts of the program. For example, if you need to calculate a square root, you program this in a single place (a function); you don't repeat all the complicated calculations everywhere you need to calculate a square root. In this example, since it is a fairly common requirement, it is already programmed in most programming languages; but you can also create your own functions for more customized calculations or processing.
In C programming, a precondition is a condition that must be true before a function is called, while a postcondition is a condition that is guaranteed to be true after the function has been executed.