How much byte is int

In some cases this may result in undesirable or unpredictable behaviour, and it may be necessary to manually insert placeholder variables to shift the data around yourself. In such cases it is often better to use fixed size variables, or re-design the struct so that the variables are ordered more efficiently.

The answer depends on many things. On older CPUs, the choice of variable would make a significant difference in how efficiently the CPU would handle the variable. For example, on a bit CPU, it would be significantly more efficient to process numbers of bits or 4 bytes , since a single number could fit into a single register on the CPU.

Nowadays other factors are arguably more important. Modern multi-core CPUs are often able to process calculations faster than the data can be loaded from memory, and so the priority is usually around making sure data flows as efficiently as possible. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Learn more. Why is it so? Ask Question. Asked 7 years, 2 months ago. Active 7 years, 2 months ago. Viewed 3k times. Improve this question. Pooja Pooja 1 1 silver badge 6 6 bronze badges. Save Close. Dashboard Logout. Basic Types They are arithmetic types and are further classified into: a integer types and b floating-point types. Enumerated types They are again arithmetic types and they are used to define variables that can only assign certain discrete integer values throughout the program.

The type void The type specifier void indicates that no value is available. Function returns as void There are various functions in C which do not return any value or you can say they return void. Function arguments as void There are various functions in C which do not accept any parameter. A char literal is a single character enclosed in single quotes.

A string is sequence of characters. However, the standard library defines a string class allowing programmers to create string variables. String literals can include spaces and escape sequences. In our discussion of variables and data types, we have shown a lot of examples of variable initialization.

The data that operators work on are called operands. The assignment operator requires two operands. The left operand must be a location in memory whose contents can be changed such as a variable. You will sometimes see references to l-value or lvalue in compiler error messages. When you see this, your left hand operand does not refer to a memory location whose contents can be changed. Chapter 2: Data types Integer data types Integer data types hold whole numbers.

The char type can contain both positive and negative values. The range of values is from to The uchar integer type also occupies 1 byte of memory, as well as the char type, but unlike it uchar is intended only for positive values. The minimum value is zero, the maximum value is