In C++, a nested if statement is used when you want to create more complex decision-making structures in your code. A nested if statement is simply an if statement inside another if statement.
The syntax for a nested if statement is as follows:
if (condition1)
{
// some code here
if (condition2)
{
// some code here
}
}
In this example, condition1 is evaluated first. If it is true, the code inside the outer if statement is executed. Then, condition2 is evaluated. If it is true, the code inside the inner if statement is executed.
Here’s an example of a nested if statement in action:
#include <iostream>
int main() {
int x = 5;
int y = 10;
if (x == 5) {
std::cout << "x is 5." << std::endl;
if (y == 10) {
std::cout << "y is 10." << std::endl;
}
}
return 0;
}
In this example, we first check if x is equal to 5. If it is, we print out a message saying that x is 5. Then, we check if y is equal to 10. If it is, we print out a message saying that y is 10.
So, when we run this code, we should see the following output:
x is 5. y is 10.
That’s because both conditions are true, so both messages are printed out.
I hope that helps you understand nested if statements in C++. Let me know if you have any more questions!
