For variables to be printed is it compulsory to initialize the variables first? In c++

Answer 1

In C++ there are different kind of variables like auto, extern, static , register etc. When you declare a variable it's auto by default. And auto variables by default stores a garbage value in them.

Answer 2

Yes. Unless you print the expressions themselves directly. For example,
print(1+1)
puts 1+1
cout<<1+1<<endl;
document.write(1+1);
System.out.println(1+1);

Just for a few languages.

Answer 3

Sometimes it may work for some languages without initialising because the compiler may auto initialise the variable to 0 but that is bad practice.

https://code.sololearn.com/cyQiLyn1huXT/?ref=app

Answer 4

So in c++ do we have to compulsorily intialise the variables?

Answer 5

Yes it is because if you don't initialise the variable then it will print some random value or garbage value.

Let say:-

Int main(){
int x;
cout<<x;
return 0;
}
In this example when you compile and run it ,it will not show any error but as we didn't initialise variable so it will print some random value or we can say garbage value