To force negative numbers to zero without affecting positive numbers, you can use a formula based on the MAX function. In the example shown, the formula in D5 is:
=MAX(C5-B5,0)
How this formula works
This formula...

To get the position of the maximum value in a range (i.e. a list, table, or row), you can use the MAX function together with the MATCH function.
In the example shown, the formula in I5 is:
=MATCH(MAX(C3:C11),C3:C11,0...

To get the position of the last match (i.e. last occurrence) of a lookup value, you can use an array formula based on the IF, ROW, INDEX, MATCH, and MAX functions. In the example shown, the formula in H6 is:
{=MAX(IF(...

To get the larger, or greater, of two values, you can use the MAX function. In the example shown, the formula in D5 is:
=MAX(B5,C5)
How this formula works
The MAX function is fully automatic – it returns the largest...

Note: these is an experimental formula that uses a hard coded array constant, set down here for reference and comment. Casually tested only, so take care if you use or adapt.
Sometimes you encounter data that mixes...

To find the longest string in a range with criteria, you can use an array formula based on INDEX, MATCH, LEN and MAX. In the example shown, the formula in F6 is:
{=INDEX(names,MATCH(MAX(LEN(names)*(class=F5)),LEN(...

To extract a word that contains specific text,you can use a formula based on several functions, including TRIM, LEFT, SUBSTITUTE, MID, MAX, and REPT. You can use this formula to extract things like email addresses, or...

To get a maximum value based on criteria, you can use the MAX function together with the IF function in an array formula. In the example shown, the formula in cell G6 is:
{=MAX(IF(names=F6,times))}
Where names is the...

Context
You have a start time and an end time, and you want to know how many of the hours in between these two times overlap another time period in the day. For example, you want to know how many hours fall between 8:...

To test if a numeric value falls between two numbers, you can use the AND function with two logical tests. In the example shown, the formula in E5 is:
=AND(D5>MIN(B5,C5),D5<MAX(B5,C5))
How this formula works...

To count consecutive monthly orders, you can use an array formula based on the FREQUENCY function, with help from COLUMN and MAX.
In the example shown, the formula in I5 is:
{=MAX(FREQUENCY(IF(C5:H5>0,COLUMN(C5:H5...

To get the maximum value in a data set based on more than one criteria (i.e. to get MAX IF), you can use an array formula based on the MAX and IF functions. In the example shown, the formula in I6 is:
{=MAX(IF(color=...

To calculate the max or min change in a set of data as shown, without using a helper column, you can use an array formula. In the example, the formula in G6 is:
{=MAX(C5:C12-D5:D12)}
Note: this is an array formula...

To get "first in, last out" times from timesheet data, you can use the MAXIFS and MINIFS functions, or an array formula as described below. In the example shown, the formula in H6 is:
=MINIFS(times,names,H5,actions,...

To get the maximum value from a set of numbers, use the MAX function.
In the example shown, the formula in cell I6 is:
=MAX(C6:G6)
The MAX function is fully automatic. It accepts one or more arguments, which can be...