Final answer:
To set the value of the variable num_cards to seven if its current value is less than seven, you can use an if statement.
Step-by-step explanation:
To set the value of the variable num_cards to seven if its current value is less than seven, you can use an if statement. Here is an example of how the code might look:
if (num_cards < 7) {
num_cards = 7;
}
In this code, the if statement checks if the current value of num_cards is less than 7. If it is, the code inside the if statement is executed and sets num_cards to 7. If the current value of num_cards is already 7 or greater, the if statement is skipped.