What is the difference b/w func declarion n funct defination?

Answer 1

function declaration tell the compiler about function name,return type and parameter

while function definition is the body or block of statement to perform task

Answer 2

when you declare prototype of the fxn then that is known as function declaration. like -
void Print(); // fxn declaration
Fxn definition: when u write actual implementation of the fxn. like
void Print()
{
cout<<"Hello world";
}

Answer 3

a function declaration is just saying "hey, I'm a function, i haven't been defined yet but I'm here" this is used when in headers,classes, and placing a function underneath of main.cpp. a definition is the actual creation of what that function is and does

Answer 4

"Definition" refers to the place where variable is created or assigned storage; "declaration" refers to places where the nature of variable is stated but no storage is allocated.