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Data types
Содержание
- 1. Data types
- 2. Most programming languages have built in data
- 3. Examples of declaration! Notice that we can assign value to a variable in declaration stage
- 4. Every data type has its own sizeWe
- 5. Situation 1We have to declare a data
- 6. What is the difference between integer and float?
- 7. Situation 2We have to declare a data
- 8. What is the difference between char and string?
- 9. Situation 3We have to declare a data
- 10. DateTime data typeThe DateTime is a value
- 11. Exercise 1Using the correct datatype declare variables
- 12. Exercise 2Which of the following declarations correct, which are wrong and why?
- 13. Exercise 3Write assignment statements for the following variables using yourself as an example: NameAgeGender
- 14. Exercise 4Which of the following declarations correct, which are wrong and why?
- 15. Exercise 5Give two reasons why is it important to get the correct datatypes:1 ___________________________2 ___________________________
- 16. Exercise 6Write code that asks the user
- 17. Exercise 7Create a form for a student that will have: name, surname, age, height, group, gender.
- 18. Скачать презентанцию
Most programming languages have built in data types that are used when declaring variables. Some common data types, and the ones you need to know for the exam, are as follows:
Слайды и текст этой презентации
Слайд 1Data types
Objectives: 1. Explain the need for a range of
different data types including Boolean, integer, decimal, date/time, character, string
Explain the purpose of data types within code, justify the selection of data structures for given situations
Слайд 2Most programming languages have built in data types that are
used when declaring variables. Some common data types, and the
ones you need to know for the exam, are as follows:
Слайд 4Every data type has its own size
We need to remember
that it’s better to use least
memory-expensive type for each
variable!
Слайд 5Situation 1
We have to declare a data type for a
variables:
numberOfstudentsInGroup
numberOfstudentsInSchool
numberOfstudentsInKazakhstan
Which one data type we should use for
each of them? Try to explain your choice.
Слайд 7Situation 2
We have to declare a data type for a
variables:
ageOfstudent
averageAgeOfstudent
maxAgeOfstudent
Which one data type we should use for each
of them? Try to explain your choice.
Слайд 9Situation 3
We have to declare a data type for a
variables:
genderOfstudent
nameOfstudent
maxAgeOfstudent
Which one data type we should use for each
of them? Try to explain your choice.
Слайд 10DateTime data type
The DateTime is a value type. It represents
an instant in time, typically expressed as a date and
time of day.
Слайд 11Exercise 1
Using the correct datatype declare variables for a person's:
Name
Age
Gender
Height(metres)
Date of Birth
license (Do they have a driver license)
Слайд 13Exercise 3
Write assignment statements for the following variables using yourself
as an example:
Name
Age
Gender
Слайд 15Exercise 5
Give two reasons why is it important to get
the correct datatypes:
1 ___________________________
2 ___________________________
Слайд 16Exercise 6
Write code that asks the user to insert the
date of birth. Calculate the age of a student.
Слайд 17Exercise 7
Create a form for a student that will
have:
name, surname, age, height,
group, gender.
