Variable declaration

OBJECTIVES Discuss the different data types that can be used in Turbo-C Explain and evaluate the rules in naming variables Create the syntax of data types and variable names in Turbo-C Codes

VARIABLE DECLARATION OF TURBO-C SYNTAX <data type> <variable name> char g ; int x , y , z ; float f=5.67 ; int x=10 ; char name[10] ;

< DATA TYPES > int a whole number consisting of an optional sign (+ or -) followed by a sequence of digit can hold integer quantities that do not require a fractional component or decimal places occupies two bytes in the address ranges from –32768 to +32767

< DATA TYPES > Types of int long int takes up more space and can store large number ranges from –2147483648 to +2147483647 occupies 4 bytes unsigned int cannot be negative from 0 to 65536

< DATA TYPES > float consists of an optional sign (+ or -), followed by one or more digits , a decimal point, and one or more further digits it can include an optional exponent ranging from 3.4 E –38 to 3.4 E +38

< DATA TYPES > double is a special float which can store more significant digits and have longer exponent ranges from 1.7E-308 to 1.7E+308 with 15 digits accuracy

< DATA TYPES > char can be used to contain a single letter, digit, punctuation mark or control symbol recognized by the computer written enclosed within single quotation marks, but literals strings are enclosed in double quotation marks

< DATA TYPES > char a character may be assigned an integer value between –128 and +127 unsigned char data type may be assigned an integer value from 0 to 255 char c; char b = ‘*’; char a[30]; char a = “apple”;

< VARIABLE NAME > arvin#030709 buendia_arvin : ] superman superman arvin25 [email_address]

< VARIABLE NAME > It must start with a letter or an underscore, with subsequent characters being letters, numbers, or the underscore _arvin superman 05buendia buendia05 %arvin *superman

< VARIABLE NAME > A Turbo C Variable may consist of 63 characters, but only the first 32 are significant do_you_know_that_this_is_one_long_variable_name_but_still_valid do_you_know_that_this_is_one_long_variable_name_but_still_considered_as_invalid tamahome miyaka_mikaela rain_mikayla

< VARIABLE NAME > A variable is case sensitive, that is, uppercase variables are treated differently Variable “ SUM ” is different from variable “ sum ” Variable “ NetPay ” is different from variable “ NETpay ”

< VARIABLE NAME > A variable cannot be the same as a Turbo C keyword. float elwin main ping dota printf

< VARIABLE NAME > Variable names must be unique and descriptive area sheverlou cute surname product churva

< DECLARING VARIABLES > #include<stdio.h> main( ) { int peso; printf(“Variable Value : %i ”, peso ); } _ Variable Value : _ 0 _ 0 0

< DECLARING VARIABLES > #include<stdio.h> main( ) { char let; printf(“Variable Value : %c ”, let ); } _ Variable Value : _ ả _ ả ả

< DECLARING VARIABLES > #include<stdio.h> main( ) { int x,y; printf(“Variable Values : %i %d ”, x , y ); } _ Variable Value : _ 0 _ 0 VARIABLE 1 VARIABLE 2 0 0 0 0 _

< DECLARING VARIABLES > #include<stdio.h> main( ) { float gross=5.84365; int age=3; printf(“Variable Values : %i %.3f ”, age , gross ); } _ Variable Value : _ 3 _ 5.84365 VARIABLE 1 VARIABLE 2 3 3 5.84365 5.844 _

< DECLARING VARIABLES > #include<stdio.h> main( ) { int a=5, b=6, c=7, para; para = a + b + c; printf(“PARAMETER : %i ”, para ); } _ PARAMETER _ 18 _ 5 6 7 0 5 6 7 18 18

Variable declaration

More Related Content

What's hot (20)

Viewers also liked (8)

Similar to Variable declaration (20)

More from Hanielle Cheng (20)

Recently uploaded (20)

Variable declaration