We’ve already seen relational operators at work. Conditionals incorporate them in all their forms.

For example, we can do something like:

if (grade >= 60) {
  // Do something
}

In much the same fashion, we could’ve used a <=, or !=, or even ==. These relational operators naturally result in true or false expressions, which make them perfect for conditionals!

However, sometimes we need to write multiple conditions in one conditional statement. In a past lesson, we learned about logical operators. We can use these operators here as well!

Let’s recap the logical operators:

• && AND
• || OR
• ! NOT

When placed in a conditional statement, logical operators work together to produce one true or false output across multiple conditions.

For example:

if (a > 0 && b > 0) {
  printf("Positive\n");
}

The above conditional checks if both conditions are true, and if they both are, the if statement passes. If either a or b was a negative number, the if statement would be false.