Summary - Conditionals

Combine if, switch and ternary to write a day-of-week app.

Summary - Conditionals

In this group you learned five constructs that make your program behave differently in different situations: if, else/else if, switch, ternary and nested conditionals.

Now you will combine them in a day-of-week app. First you will print the day name with switch, then check weekday vs weekend with if/else. Such combined tasks appear all the time in menus, clocks and state machines.

Exercise Day name (switch)

The day variable is set to 3. Use switch (day) so that in case 3 the program prints "Wednesday". Add a break too.

Show example solution

#include <iostream>

int main() {
    int day = 3;
    switch (day) {
        case 3:
            std::cout << "Wednesday" << std::endl;
            break;
    }
    return 0;
}

Exercise Weekend check (if/else)

The day variable is set to 6. Use the condition if (day == 6 || day == 7) to check the weekend; print "Weekend" when true and "Weekday" when false.

Show example solution

#include <iostream>

int main() {
    int day = 6;
    if (day == 6 || day == 7) {
        std::cout << "Weekend" << std::endl;
    } else {
        std::cout << "Weekday" << std::endl;
    }
    return 0;
}

Test yourself

Match each construct to its scenario

if (x > 0)

Single condition check
if/else if/else

Multiple ranges
switch (day)

Constant value pick
(a > b) ? a : b

One-line pick
Which construct does one-line conditional assignment?
```
// one-line pick
```
- if/else
- ternary (? :)
- switch
- for loop
Show answer

ternary (? :) — The ? : operator yields a conditional value in one line.

Write the ternary symbol

int a = 7;
int b = 12;
int max = (a > b) ____ a : b;

Show answer

int a = 7;
int b = 12;
int max = (a > b) ? a : b;

Next lesson: The for loop

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