Programming with MATLAB

Relational Operators

Relational Operators

The arithmetic operators has precedence over relational operators

Logical Operators

Order of precedence for operators

Order of precedence for operators

Logical variables

Logical variables can take only two values: <> 0 (true) 0 (false)

The if statement

End

Start

The if statement

If x is greater than or equal 5, the statement y = sqrt(x-5) gets executed

Otherwise, the statement does not execute

50

55

x

xxy

The if statement

The value of z and w are computed only if both x and y are nonnegative.

If any of x or y is negative, both w and z retain their initial values

The else statement

The else statement

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55

x

xxy

The else statement

If x is nonnegative, y = sqrt(x) is executed If x is negative, an error message is

displayed

The elseif statement

Example: Numeric grade to letter grade Write a program to display your course letter

grade knowing your numeric grade Example:

If your numeric grade is 93, then the program displays

the letter A If your numeric grade is 70, then the program displays

the letter C

Nested if statement

=

Nested if statement

This statement gives the same result as the previous one

=

Examples

Write a function that accepts one variable, which is the year and returns a logical variable: true (if the year is leap) or false (if the year is not leap)

A leap year is characterized by All years evenly dividable by 400 are leap All years that are evenly dividable by 4 and are

not evenly dividable by 100 are leap

Examples