How to check if the character under the cursor is a tab?

Question

I am using the code getline(".")[col(".")-1] to get the character under the cursor. How can I check if the character under the cursor is a tab ?

Answer 1

Just compare the character you got with a tab, which can be represented with the \t escape sequence. That is,

getline(".")[col(".")-1] == "\t"

The expression will return 1 if the character is tab, 0 if not.