What is difference between int and varchar?

Varchar is used when the data to be dealt with is a set of characters on which numerical operations cannot be performed directly whereas int is used when certain numerical are to be performed on it. Varchar includes numbers, alphabets as well as special characters whereas int only include numbers.

What is the difference between int and float in C?

Integers and floats are two different kinds of numerical data. An integer (more commonly called an int) is a number without a decimal point. A float is a floating-point number, which means it is a number that has a decimal place. Floats are used when more precision is needed.

What is the difference between int, char and float?

char – char defines a character used to store a single character. int – int is used to store integer numbers. float – float is used to define floating-point numbers with single precision. double – double is used to define floating-point numbers with double precision. Different data types also have different value range.

What is the difference between a char and a byte?

In Java a byte is a signed 8-bit value, and a char is an unsigned 16-bit value. The Character is both a wrapper type for char and a utility class for a number of useful method supporting char. The key difference between an InputSTream is that it reads binary data, one byte at a time.

How can I convert a char to INT in Java?

We can convert char to int in java using various ways. If we direct assign char variable to int, it will return ASCII value of given character. If char variable contains int value, we can get the int value by calling Character.getNumericValue (char) method. Alternatively, we can use String.valueOf (char) method.

How many bytes are in a char?

A char is always one byte, at least as the standard defines a byte. 1 byte = 8 bits. Not necessarily, although with the restrictions imposed by the standard (and if memory serves,) I believe a byte in C++ must always have at least 8 bits. http://en.cppreference.com/w/cpp/types/numeric_limits/digits in particular.