What does syntax means?

Answer 1

Syntax are the predefined codes that compiler understands, which one has to learn in order to interact with the compiler.
For example,
#include<iostream.h>
void main()
{
cout<<" all these codes are syntax except this one written inside double inverted comas ."
}
Basically syntax means the ' format'!

Answer 2

it's just for understanding the structure of the codes