If Statements

In C/C++, the if statement is used in the same way it is in C#: to branch between two instruction paths based on a condition.

Syntax

The syntax of the if statement is the same in C/C++ and C#.

Conditions here are formed as boolean expressions, as they were in C#. C/C++ also uses the same comparisons and boolean operators as C#.

Kind	Description	Operator
Equal	Are the values the same?	a == b
Not Equal	Are the values different?	a != b
Larger Than	Is the left value larger than the right?	a > b
Less Than	Is the left value smaller than the right?	a < b
Larger Or Equal	Is the left value larger than or equal to the right?	a >= b
Less Or Equal	Is the left value smaller than or equal to the right?	a <= b

	Description	Operator	Example
And	Are both values true?	&&	a && b
Or	Is at least one value true?	||	a || b
Xor	Is one value true, and the other false?	^	a ^ b
Not	Is the value false?	!	! a

Tip

These are the kinds of things you need to check when you learn a new language. As C# was based on the C syntax, much of this is the same.

Example

Here is the same example we worked through on the if statement page. To get this working, we need to use the SplashKit library to get access to read_line and write_line.

#include "splashkit.h"

int main()
{
    string language;

    write("What language do you use? ");
    language = read_line();

    if (language == "C#")
    {
        write_line("Good choice, C# is a fine language.");
    }
    else if (language == "C" || language == "C++")
    {
        write_line("These are great low level languages - we will be using these soon!");
    }
    else
    {
        write_line("Well... good luck with that!");
    }

    write_line("Great chat!");
}