Store and Retrieve Data Using Literal and Variable Values in C#

Question

Which of the following lines of code creates a variable correctly?

Complete this challenge on freeCodeCamp.

Option 1

int x = 12.3m;

Here we are declaring a variable called x with a type of int. The key point to remember is that integers are whole numbers.

Next we assign x to the literal value 12.3m. The decimal point signifies that this is a floating-point numeric type which can have decimal places. The m suffix is the literal for a decimal value.

C# is a strongly typed language and makes sure that all operations in your code are type safe. When you declare a variable you can’t assign a value not compatible with its declared type. For example, you can’t declare an int and assign it a decimal value as this would cause data loss which could result in unexpected bugs.

If you tried to compile the code in this example, you would get a compiler error.

This is incorrect.

Option 2

decimal x = 12.3m;

Here we are declaring a variable called x with a type of decimal.

Next we assign x to the literal value 12.3m. The m suffix is the literal for a decimal value.

This is correct.

Option 3

bool x = 'False';

Here we are declaring a variable called x with a type of bool. A bool can be assigned the literal value true and false.

Next we assign x to the value 'False'. The single quote characters here indicate this is a char type. A char can be assigned to a single character.

If you tried to compile the code in this example, you would get a compiler error.

This is incorrect.