The TPM system in a 2007+ generation Nissan Altima has dashboard light that comes on when there is a difference in tire pressure between two tires. There is a U shaped tire image with an exclamation point in it, which means you have to check tire pressures on all four tires.
This is sign for Tyre Air pressure issue (I got an answer from Nissan Service Adviser)
low power light, may be a vac leak
tire exit
Low tire pressure.
An exclamation mark after a number is the symbol for the factorial function.
an exclamation point !
The exclamation mark on any sign is an alarm or warning. With a fire symbol, the sign is warning of combustibles nearby.
The Factorial symbol is the exclamation point. (!) This symbol means to multiply a row of natural descending numbers.
! is an exclamation.? is a question mark.
Usually, " warning!!!"
If it is to the left of the 1 key it is called the tilde key
It is called an 'exclamation point'.