C++Tutorial for Beginners 9 - Integer Variable Types

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We'll take a closer look at C++'s integer variable types in this tutorial. Choosing the right size variable for your data is very important in C++, especially since C++ won't necessarily warn you if you choose a type that's too small -- your program just won't work properly!
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[kupomomo]

thanks a lot professor! after these few tutorials I learned how to do this xd:
#include <iostream>
#include <limits>
using namespace std;

int main() {
    string name;
    int age;
    cout<<"what is your name?";
    cin>> name;
    cout<<"How old are you?";
    cin>> age;
    if ((name=="Kevin") &&(age==15)) {
        cout<<"We have the same name and age!";
    }
    else if ((name!="Kevin")||(age!=15))
        cout<<"We are not alike!";

 
}

[raylie]

Good tutorial, but maybe he should mention the 32bit/64bit issue when explaining the 'long int' and 'int'. I have to use the 'long long int' to store 2345325345345 on my 32b Ubuntu puter..

[anuragtripathi]

while writing cout << value or uvalue << endl; why did you not write with  " " for example why did you not write cout <<"value" or "uvalue" << endl;       ???

[heatlife]

I tried doing long int value2 = 259358737589273; but It only shows the max size of an Int should have... But It was fixed by doing long long int value2 = 259358737589273;... Why is this?! and Why is the LONG_MAX is the same as the INT_MAX?

[tokugeeky]

Excuse me but when I tried to type in INT_MAX n INT_MIN the laptop keep telling me there no such things wonder what did I do wrong? Everything else I tried to follow your example n work just fine it just the INT_MAX & MIN that not being recognized by the workspace.

Never mind turn out just have to switch between #include <limits.h> or #include <climits> to c which 1 work, thank u for the video man :D

[SDEliptiK]

For both long and short int types, it says: "overflow in implicit constant conversion [-Woverflow]"

[frosborg]

I got a compilation error when using the same code as you, using the gcc compiler on Linux. It wouldn't recognize INT_MIN and INT_MAX as defined.

Changing the line #include  <limits> to #include <limits.h> fixed the problem, though I don't really understand why.

[heatlife]

I have an error while doing INT_MAX but It was fixed by just doing #include <limits.h> instead of <limits>... Why is this?

[yangyangyang]

When i type INT_MAX and INT_MIN
"was not declared in this scope"

I´m using the exact same software and same code you did in the video. What could be the problem?

[heatlife]

So you don't need to put "int" when doing like long int = 2526?

[silentpredator]

sir... nice tutorial but... what abt double int or double..?

[nazariiblazhchuk]

Hey there, can anybody tell me how to use command "limits" on Visual Studio, I mean what exactly to type. I just cannot find that((

[philipsheard]

Can anyone explain why i get the same value using INT_MAX and LONG_MAX? I'm using visual studio.
2147483647
2147483647

[身世成谜]

Clever IDE.
I tried Qt Creator, no response to abnormal interger.

[Cryptorax]

When I type in "long int lValue = 2323447365368" and start the project, it shows me a complete different number. What do I wrong? (I use Windows 7 and use MinGW GCC as toolchain)
Here is my code:

int main() {

int value = 56458;
cout << value << endl;
cout << INT_MAX << endl; // prints

long int lValue = 2323447365368;
cout << lValue << endl;

short int zValue = 22629;
cout << zValue << endl;
return 0;
}

[claramelb]

I used long int but it wouldn't give me the exact value I put! It's giving me a warning about overflow...

[deodorant]

man do you know how to fix the auto completion it's not working i'm using eclipse and tried look in stack over flow and eclipse forums but none was helpful please tell me if you know

[randomshit]

for every one who tried log int and it didnt give the exact value, use long long int

[mdalaminhossian]

When I type INT_MAX and INT_MIN
"was not declared in this scope"
not understand..plz

[MRPISSFLAP]

I typed this out:
long int lvalue =
cout << "Long value = " << lvalue << endl;
and the value I got on the console was different. Any ideas what im doing wrong?
I'm using codeblocks.