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stringsthe matlab also handles strings that are a sequence of characters in single quotes for illustration using the double function on a string will
function charthe function char does the opposite it converts from any number type to the type chargtgt charnumequivans aas the letters of the
characters and encodinga character in a matlab is represented by using single quotes example a or x the quotes are essential to denote a character
the efficient methodthough in matlab there is another built-in function which specifically produces random integers ie randint calling the function
the programming conceptin most of the programming languages random function returns a real number therefore the real number would then have to be
produce a random real numberto produce a random real number in the range from low to high at first create the variables low and high and then use the
illustrations of calling the rand functionthe function lsquorandrsquo can be used to produce random real numbers calling it produces one random real
random numberswhenever a program is being written to work with a data and the data is not yet available it is frequently useful to test the program
type logicalthe type logical is used to store the truefalse valuesif any variables have been formed in the command window they can be seen at the
typeseach and every expression or variable has a type related with it the matlab supports numerous types of values that are known as classes a class
illustration of built-in functions and helpto find out what a specific function does and how to call it type help and then the name of function
built-in functions and helpthere are lots of built-in functions in a matlab the help command is used to find out what functions matlab has and how to
operator precedence rulesa few operators have precedence over the others for illustration in the expression 4 5 3 the multiplication takes the
operatorsthere are in general two types of operators unary operators that operate on a single value or operand and binary operators that operate on
format commandthe format command can be used to control the spacing between the matlab command or expression and the outcome it can be either compact
the format function and ellipsisthe default in matlab is to show numbers which have decimal places with four decimal places the format command can be
expressionsthe expressions can be formed using values variables which have already been formed operators parentheses and built-in functions for
example of variable namesif nothing appears when who or whose is entered which means there arent any variables for illustration in the starting of a
rules for variable namesin addition the variable names must always be mnemonic that means they should make some sense for illustration if the
variable namesvariable names are an example of the identifier names the rules for identifier names are as shown belowathe name should begin with a
illustration of assignment statementsat that point if the expression mynum 3 is entered the default variable ans is used as the result of this
to change a variableto change a variable the other assignment statement can be used that assigns the value of a different expression to it consider
error in variables statementserror the expression in the left of equals sign is not a valid target for an assignmentgtgt by placing a semicolon at
example of variables and assignment statementsthe expression is computed and then that value is stored in the variable for illustration this is the
variables and assignment statementsa variable is used in order to store a value in a matlab session or in a program the workspace window represents