Absolute reference

What does Absolute reference mean?

In computing, an absolute reference is a Cell reference in a spreadsheet or other table that always refers to the same cell, regardless of where the formula containing the reference is copied or moved. This is in contrast to a relative reference, which refers to a cell relative to the position of the formula.

Absolute references are created by preceding the cell reference with a dollar sign ($). For example, the absolute reference $A$1 always refers to the cell in the first row and first column of the spreadsheet, regardless of where the formula containing the reference is located.

Absolute references are useful for several reasons. First, they can help to prevent errors when formulas are copied or moved. For example, if a formula contains a relative reference to a cell that is later deleted, the formula will return an error. However, if the formula contains an absolute reference to the cell, the formula will still work correctly.

Second, absolute references can be used to create formulas that refer to cells in other worksheets or workbooks. For example, the formula =SUM(Sheet2!$A$1:$A$10) would add the values in the range A1:A10 in the worksheet named Sheet2.

Third, absolute references can be used to create formulas that refer to cells in a table that is sorted or filtered. For example, the formula =INDEX($A$1:$A$100,MATCH(A2,$A$1:$A$100,0)) would return the value in the cell in the range A1:A100 that matches the value in cell A2.

Applications

Absolute references are used in a variety of applications, including:

• Spreadsheets: Absolute references are commonly used in spreadsheets to create formulas that refer to cells in other worksheets or workbooks. This can be useful for creating consolidated reports or for performing calculations on Data that is stored in Different locations.
• Databases: Absolute references can be used in databases to create queries that refer to specific cells or ranges of cells in a table. This can be useful for filtering data or for creating reports.
• Programming: Absolute references can be used in programming to create variables that refer to specific memory locations. This can be useful for storing data that needs to be accessed from multiple parts of a program.

History

The concept of absolute references was first introduced in the early days of spreadsheet software. The first spreadsheet program, VisiCalc, allowed users to create absolute references by preceding the cell reference with a dollar sign ($). This convention has been adopted by all subsequent spreadsheet programs, including Microsoft Excel, Google Sheets, and Apple Numbers.

Absolute references have also been used in databases and programming languages for many years. In databases, absolute references are often used to create queries that refer to specific cells or ranges of cells in a table. In programming languages, absolute references are often used to create variables that refer to specific memory locations.