How to tell if my Windows 10 is 32 bit or 64 bit?

win key +R>type msinfo32>enter

If it is 64 bit it will say so otherwise it is 32bit

How can I tell if my Windows 10 is 32 bit or 64 bit?  Please don't tell me about IE again or windows seven.  I need to download a program which runs on Windows 10 but it needs to know if this machine is running 32 or 64 bit?

Totally agree with ZigZag3143, he's a guru, thanks to him.

The "msinfo32.exe (System Information)" also could start from the Cortana's search box as follows:
type or paste "msinfo32" in the Cortana's search box, and then tap or click on the words which reveal on the Cortana's pop-up parts:
System Information
Desktop app

Then the "System Information" is running.
Then as ZigZag3143's picture, under "System Summary", you could find that the "System Type" is "x64-based PC" (or "x86-based PC", or others).

Also could execute the following operations in the graphical interface tool to get the same results:
Right-click Start button (or press-and-hold Start button, or press Win+X), then click "System" (or tap "System", or Press Y),

then "Control Panel\System and Security\System" window pops up, for example, I could find the following words in it:
"System type: 64 bit Operating System, x64-based processor"
Note：within the prompts above, before the comma, the "64 bit" points to the operating system's software architecture type; after the comma, the "x64-based" points to the computer's hardware architecture type.
(BTW, also could right-click Start button, then click "Control Panel", then select "Control Panel -> System and Security -> System", can get the same results too.)

The command line operation below can get the same results too.
Could open a "Command Prompt (Admin)" window by one of the following three ways ('I. Keyboard' or 'II. Mouse' or 'III. Touch'):
I. Keyboard: Win+X, A, Alt+Y
II. Mouse: rightclick Start button, click "Command Prompt (Admin)", click "Yes" button
III. Touch: press-and-hold Start button, tap "Command Prompt (Admin)", tap "Yes" button

Then in the "Command Prompt (Admin)" window, could run the following command to view the software architecture type of OS:
[Type or paste the command]
wmic os get osarchitecture
[Hit or press the Enter key]

(
By the way, also could run the following command to view the hardware architecture type of PC:
[Type or paste the command]
wmic computersystem get systemtype
[Hit or press the Enter key]
)

Supplement:

How to open a "Command Prompt (Admin)" window?
You could open a "Command Prompt (Admin)" window by one of the following three ways ('I. Keyboard' or 'II. Mouse' or 'III. Touch'):
I. Keyboard: Win+X, A, Alt+Y
II. Mouse: rightclick Start button, click "Command Prompt (Admin)", click "Yes" button
III. Touch: press-and-hold Start button, tap "Command Prompt (Admin)", tap "Yes" button

Common knowledge about command line operations:
In an opened command window - namely a "Command Prompt (Admin)" window or a PowerShell console window, the following are the conventional rules of command line operations:
[Type or paste the command] - Either type a command directly or paste a command text, both of their results effected are the same. At any time, you can directly type a command in the command window; or, you also can paste a command text in the command window. To copy a command text, please use "hold down and drag" to select the command text in here with your left mouse button, and then right-click, then there will pop up a shortcut menu, then click "Copy" item on the shortcut menu. To paste the command text, in the command window please right-click, then you will find that the command text already had been pasted in there.
[Hit or press the Enter key] - At any time, after finishing the "Type or paste the command" operation, you wanna execute the command, please hit or press the Enter key, then you will find that the command is running.
[Hit or press the Up key] - At any time, you wanna repeat the last command, please hit or press the Up key. Tip: you often wanna repeatedly use or edit a previous command, that can be done by using the Up or Down arrow keys to scroll through the history.
[Exit] - At any time, after finishing all the command line's operations, you wanna exit the command window, please click the Close button on the upper right corner of the command window; or you also could type "exit" command directly and then hit or press the Enter key to back to the top level window or close the window completely.

Thank you Cat. Amazing what one forgets when not having to did into the operating system and hardware for 11+ years.

Appreciate your insight.

Kind Regards,

Vic Blizzard