Action Decision Making: Relational Operators Quiz

9 Questions

What do the logical operators && and || typically test for?

Multiple conditions and decisions

Which operator is used for incrementing a variable by 1 in C programming?

What happens when the increment operator '++' is placed before a variable?

The variable is increased by 1 before assigning its current value

In the expression 'a=a+1', what does the assignment operator '=' represent?

Assignment

Which operator is used to decrement a variable by 1 in C programming?

What is the result of '5 * (7 + 3)'?

$50

'a *= (n + 1)' is an example of which operator in C programming?

What do preincrement and predecrement operators do in C programming?

Increment/decrement first and then assign the value

How are logical operators || and && used in decision making?

To test multiple conditions and make decisions

Study Notes

Decision Making: Relational Operators

In C, the decision-making process is controlled by the if structure, which allows a program to make a decision based on a condition's truth or falsity.
The condition in an if structure is formed using relational operators.
Relational operators have the same level of precedence and associate left to right.
Equality operators (== and !=) have a lower level of precedence than others and associate left to right.
There is a subtle difference between == and =: = is used for assignment, and == is used for comparison.

Relational Operators

Examples of relational operators include ==, !=, <, >, <=, >=.
Relational operators are used to compare values and make decisions in a program.

Logical Operators

Logical operators include && (Logical AND), || (Logical OR), and ! (Logical NOT).
These operators are used to test more than one condition and make decisions.
Logical operators can be used to create complex conditions.

Operator Precedence

Multiplication, division, and modulus operations are evaluated first in an expression.
If an expression contains several *, /, or % operations, evaluations proceed from left to right.
Addition and subtraction are evaluated last in an expression.
If an expression contains several + or - operations, evaluations proceed from left to right.

Assignment Operators

The assignment operator = is used to assign a value to a variable.
Shorthand assignment operators, such as +=, -=, *=, etc., can be used to simplify assignment statements.

Increment and Decrement Operators

C provides the unary increment operator ++ and unary decrement operator --.
The increment operator can be used to increment a variable by 1.
The decrement operator can be used to decrement a variable by 1.
The increment and decrement operators can be used as prefix or postfix operators.
The meaning of the increment and decrement operators differs based on their placement before or after the variable.

Examples

The if structure can be used to compare values and make decisions in a program.
Logical operators can be used to create complex conditions in a program.
Increment and decrement operators can be used to simplify increment and decrement operations.