1. Logic is very important in a computer program, And conditionals are the basis for logic. Lets make a program that tells us whether our number is smaller than 5, equal to ten or neither of those.
    int num;
cout << "Choose a number!" << endl;
cin >> num;
if(num < 5) {
    cout << "Less than 5!" << endl;
}
else if(num == 10) {
    cout << "Its 10!" << endl;
}
else {
    cout << "Its bigger than 5 and isn't 10" << endl;
}
  2. We see three new things here if(), elif() and else:
    1. An if statement or an else if statement runs the code in the curly braces if the contents of the brackets are true. So if(true) {} would always run. A else if statement must be proceeded by an if or another else if.
    2. An else statement can be after an if or an else if, It runs if all other statements return false.

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