Этапы решения задач на компьютере. Алгоритмизация и программирование

David Watson, Helen Williams “Computer Science” Hodder Education London – 2015

String

• Bir necha simvollardan iborat bo’lgan STRING (satr) turidagi o’zgaruvchi yoki o’zgarmasni belgilaydi.
• Satrlar uzunligi bo’yicha belgilanadi va ular hech qanday simvolga ega bo’lmasligi mumkin.: bo’sh satr. Simvollarga harflar va / yoki sonlar va / yoki biron boshqa chop etiladigan simvollar kiradi. Masalan:
• Var TelephoneNumber = ‘44121654331’ JavaScript
• Var FirstName = ‘Emma’ JavaScript
• Var UnRepeatable = ‘@!&&@@##!’ JavaScript
• TelephoneNumber = ‘44121654331’ Python
• FirstName = ‘Emma’ Python
• UnRepeatable = ‘@!&&@@##!' Python

Mantiqiy tip

• Boolean o’zgaruvchisi fakat ikkita qiymatni qabul qilishi mumkin: TRUE yoki FALSE.
• Var AgeOver21 = true JavaScript
• AgeOver21 = true Python

Real

• A REAL NUMBER is a positive or negative number with a fractional part. Real numbers can be used with mathematical operators.
• Not all programming languages distinguish between real numbers and integers.
• JavaScript makes no distinction; Python does with the use of built-in functions.
• FirstInteger =
• int(25)
• sets up an integer variable with the value of 25 in
• Python
• FirstReal = float(25) sets up a real variable with the value of 25.0 in Python

Real

• Haqiqiy son. Kasr qismli musbat yoki manfiy son. Haqiqiy sonlar matematik operatorlarda qo’llanilishi mumkin.
• Ba`zi dasturlash tillari haqiqiy sonlar va butun sonlar o’rtasida farqni belgilamaydi. JavaScript shu katorga kiradi; Python esa maxsus funktsiyalar orqali farqlaydi.
• FirstInteger =
• int(25) 25 qiymatga ega butun sonli o’zgaruvchini belgilaydi Python
• FirstReal = float(25) 25.0 qiymatli haqiqiy o’zgaruvchini yaratadi