How to compare initial digits for three numbers in row of matrix.

Hi guys, I have rows of numbers with the following format(for example) case1 A=[803.445,803.534, 803.5212] as can be seen here, the all first digits of the third number are equal (8,8,8) case 2 A=[803.445,803.534, 522.345], as can be seen here, the first digits of the third is different.(8,8,5) I want to write command to compare the value and doing something When the case is achieved and something else when the case is achieved

[John D'Errico]

You just asked this question. You got multiple responses. Stop asking the same question multiple times.