Summary - Operators

Combine arithmetic, comparison and bitwise operators to build a grade calculator.

Summary - Operators

In this section you learned C++ operators:

Arithmetic: + - * / % and ++ --
Assignment: = += -= *= /= %=
Comparison: == != < > <= >=
Logical: && || !
Bitwise: & | ^ ~ << >>

Now you will combine these operators in two tasks.

Exercise Arithmetic and comparison

Inside main, declare int x = 8; and int y = 3;. Compute the sum with int sum = x + y;. Check whether the sum is greater than 10 with bool check = sum > 10;. Print sum and check on separate lines with std::cout using std::endl.

Show example solution

#include <iostream>

int main() {
    // Declare x and y
    int x = 8;
    int y = 3;
    // Compute sum and check, print both
    int sum = x + y;
    bool check = sum > 10;
    std::cout << sum << std::endl;
    std::cout << check << std::endl;
    return 0;
}

Exercise Logical and arithmetic together

Inside main, declare int a = 5; and int b = 10;. Check whether both are positive with bool result = (a > 0) && (b > 0);. Print result with std::cout using std::endl.

Show example solution

#include <iostream>

int main() {
    // Declare a and b
    // Compute result and print it
    int a = 5;
    int b = 10;
    bool result = (a > 0) && (b > 0);
    std::cout << result << std::endl;
    return 0;
}

Test yourself

What is the result of 7 > 3 && 2 < 1?
- 1 (true)
- 0 (false)
- Error
- 7
Show answer

0 (false) — 7>3 is true but 2<1 is false; true && false = false.
Match operator categories

+ - * /

Arithmetic
+= -=

Assignment
== !=

Comparison
&& ||

Logical

Next lesson: std::string basics

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