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EXCEL logical functions : the NOT function

January 21, 2010 By admin Leave a Comment

The NOT function, one of many EXCEL logical functions, is used to evaluate a single logical condition, passed as an argument to the function.  It will return the opposite of that argument. I.e.:

  1. If the evaluated logical condition is TRUE, the function will return FALSE.
  2. If the evaluated logical condition is FALSE the function will return TRUE.

Syntax

NOT(logical)

Logical is a condition that evaluates to TRUE or FALSE.

Examples:

A1 = 6

B1 = 10

=NOT(A1>5) : returns FALSE.

= NOT(A1>10): returns TRUE.

=NOT(A1=B1): returns TRUE.

You can nest the NOT function within another logical function as follows:

=IF(NOT(A1=B1) ;”Valid numbers”;”Invalid numbers”)

If you put this formula in C1 for example, and A1 and B1 have the values shown above, then C1 will have the value: “Valid numbers”, because the NOT function will evaluate to TRUE.

Filed Under: Excel 2007, Formulas, Functions Tagged With: Excel, Excel 2007, Formulas, Functions

EXCEL logical functions : the OR function

January 7, 2010 By admin Leave a Comment

The OR function , one of many EXCEL logical functions, is used to evaluate a number of logical conditions, passed as arguments to  the function.  The function will return a single value of TRUE or FALSE.

Syntax

OR(logical1, logical2 ………)

logical1 and logical2 are conditions that evaluate to TRUE or FALSE. The first argument is required the second one is optional.

You can have up to 30 arguments in EXCEL 2003 and 255 in EXCEL 2007.

Examples:

A1 = 6

B1 = 10

=OR(A1>5;B1>10) : returns TRUE.

= OR(A1>10;B1>10):returns FALSE.

=OR(A1>5;B1>5): returns TRUE.

You can nest the OR function within another logical function as follows:

=IF(OR(A1>5;B1>10) ;”Valid numbers”;”Invalid numbers”)

If you put this formula in C1 for example, and A1 and B1 have the values shown above, then C1 will have the value : “Valid numbers”, because the OR function will evaluate to TRUE.

Filed Under: Excel 2007, Formulas, Functions Tagged With: Excel 2007, Formulas, Functions

EXCEL logical functions : the AND function

January 5, 2010 By admin Leave a Comment

The AND function , one of many EXCEL logical functions, is used to evaluate a number of logical conditions, passed as arguments to  the function.  The function will return a single value of TRUE or FALSE.

Syntax

AND(logical1, logical2 ………)

logical1 and logical2 are conditions that evaluate to TRUE or FALSE. The first argument is required the second one is optional.

You can have up to 30 arguments in EXCEL 2003 and 255 in EXCEL 2007.

Examples:

Cell A1 = 6

Cell B1 = 10

Cell C1 :

=AND(A1>5;B1>10) : returns FALSE.

=AND(A1>5;B1=10): returns TRUE.

=AND(A1>5;B1>5): returns TRUE.

You can nest the AND function within another logical function as follows:

=IF(AND(A1>5;B1>10) ;”Valid Range”;”Invalid Range”)

If you put this formula in C1 for example, and A1 and B1 have the values shown above, then C1 will have the value : “Invalid Range”, because the AND function will evaluate to FALSE.

Filed Under: Excel 2007, Formulas, Functions Tagged With: Excel 2007, Formulas, Functions

EXCEL logical functions : IF function

January 2, 2010 By admin 2 Comments

The IF function, one of many EXCEL logical functions, is used to evaluate a logical condition, passed as an argument to the function.  The function will then return one of two values specified as the second argument or the third argument in the function. It will return the second argument if the test evaluates to TRUE or the third argument if the test evaluates to FALSE.

Syntax

IF(logical test , value if TRUE, value if FALSE)

Logical test:  is a condition that evaluates to TRUE or FALSE.

Value if TRUE : is the value to be returned by the function if  logical test evaluates to TRUE.

Value if FALSE : is the value to be returned by the function if  logical test evaluates to FALSE.

Examples:

A1 = 6

B1 = 10

=IF(A1>5; “Valid value”; “Invalid Value”): returns “Valid value”

=IF(A1>B1;A1-B1;B1-A1) : returns 4. This function will always return a positive number.

Filed Under: Excel 2007, Formulas, Functions Tagged With: Excel, Excel 2007, Formulas, Functions