Difference between revisions of "Constants - Variables - Data Types"
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<syntaxhighlight lang="csharp">bool example = true;</syntaxhighlight> | <syntaxhighlight lang="csharp">bool example = true;</syntaxhighlight> | ||
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*String is used for storing characters in word form. | *String is used for storing characters in word form. | ||
<syntaxhighlight lang="csharp">string example = "hello world";</syntaxhighlight> | <syntaxhighlight lang="csharp">string example = "hello world";</syntaxhighlight> | ||
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*Integer is used to store whole numbers (32 bit values). | *Integer is used to store whole numbers (32 bit values). | ||
<syntaxhighlight lang="csharp">int example = 457568368;</syntaxhighlight> | <syntaxhighlight lang="csharp">int example = 457568368;</syntaxhighlight> | ||
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*Double is used to store numbers where there are numbers before and after the decimal point, using 64 bits of memory. | *Double is used to store numbers where there are numbers before and after the decimal point, using 64 bits of memory. | ||
<syntaxhighlight lang="csharp">double example = 3.3;</syntaxhighlight> | <syntaxhighlight lang="csharp">double example = 3.3;</syntaxhighlight> | ||
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*Decimal is used to store larger numbers with information before and after the decimal point, using 128 bits of memory. | *Decimal is used to store larger numbers with information before and after the decimal point, using 128 bits of memory. | ||
<syntaxhighlight lang="csharp">decimal example = 12.593;</syntaxhighlight> | <syntaxhighlight lang="csharp">decimal example = 12.593;</syntaxhighlight> | ||
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*Character is used to store single letters. | *Character is used to store single letters. | ||
<syntaxhighlight lang="csharp">char example = 'A';</syntaxhighlight> | <syntaxhighlight lang="csharp">char example = 'A';</syntaxhighlight> | ||
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*Byte is used to store a byte( eight 1's or 0's). | *Byte is used to store a byte( eight 1's or 0's). | ||
<syntaxhighlight lang="csharp">00101101</syntaxhighlight> | <syntaxhighlight lang="csharp">00101101</syntaxhighlight> | ||
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*Float is used to store a 32 bit decimal number, which must be defined as being a float using "F" or "f" to distinguish it from a double, or it may cause compilation errors. | *Float is used to store a 32 bit decimal number, which must be defined as being a float using "F" or "f" to distinguish it from a double, or it may cause compilation errors. | ||
<syntaxhighlight lang="csharp">9.4F</syntaxhighlight> | <syntaxhighlight lang="csharp">9.4F</syntaxhighlight> | ||
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*Long integer is also used to store whole numbers (However these are 64 bit values). | *Long integer is also used to store whole numbers (However these are 64 bit values). | ||
<syntaxhighlight lang="csharp">long example = 7846354759340276482;</syntaxhighlight> | <syntaxhighlight lang="csharp">long example = 7846354759340276482;</syntaxhighlight> | ||
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*Constants are used to create a variable of a specified data type that can never be changed after declaration, all global variables should be declared constant. | *Constants are used to create a variable of a specified data type that can never be changed after declaration, all global variables should be declared constant. | ||
<syntaxhighlight lang="csharp">const int example = 32</syntaxhighlight> | <syntaxhighlight lang="csharp">const int example = 32</syntaxhighlight> | ||
Revision as of 20:56, 16 December 2016
There are 9 types of data types. These include boolean, string, integer, double, decimal, character, byte, float and long:
- Boolean is a binary value, being either true or false.
bool example = true;
- String is used for storing characters in word form.
string example = "hello world";
- Integer is used to store whole numbers (32 bit values).
int example = 457568368;
- Double is used to store numbers where there are numbers before and after the decimal point, using 64 bits of memory.
double example = 3.3;
- Decimal is used to store larger numbers with information before and after the decimal point, using 128 bits of memory.
decimal example = 12.593;
- Character is used to store single letters.
char example = 'A';
- Byte is used to store a byte( eight 1's or 0's).
00101101
- Float is used to store a 32 bit decimal number, which must be defined as being a float using "F" or "f" to distinguish it from a double, or it may cause compilation errors.
9.4F
- Long integer is also used to store whole numbers (However these are 64 bit values).
long example = 7846354759340276482;
- Constants are used to create a variable of a specified data type that can never be changed after declaration, all global variables should be declared constant.
const int example = 32
