Consider the above data, we know that there are different types of data are used in the computer. Explain different data types used in C++.

Question

Name	Jose
Roll no	20
Age	17
Weight	46.650

Consider the above data, we know that there are different types of data are used in the computer. Explain different data types used in C++.

Answer 1

i) int data type: It is used to store whole numbers without fractional (decimal point) part. It can be either negative or positive. It consumes 4 bytes (32 bits) of memory. i.e. 2³² numbers. That is 2³¹ negative numbers and 2³¹ positive numbers (0 is considered as +ve) So a total of 2³² numbers. We can store a number in between -2³¹ to + 2³¹1.

ii) char data type: Any symbol from the key board, 

eg; ’A’.,’?’, ‘9’,…. It consumes one byte( 8 bits) of memory. It is internally treated as integers, i.e. 28 = 256 characters. Each character is having a ASCII code, ‘a’ is having ASCII code 97 and zero is having ASCII code 48.

iii) float data type: It is used to store real numbers i.e. the numbers with decimal point. It uses 4 bytes(32 bit?) of memory. 

Eg. 67.89,89.9 E-15. 

iv) double data type: It is used to store very large real numbers. It uses 8 bytes(64 bits) of memory. 

v) void data type : void means nothing. It is used to represent a function returns nothing.