How to perform a system reset by software?

[xpp07]

I'm programming a L432KC Nucleo using STM32CubeMx. When a certain condition is given in my program I want the controller to reset itself instead of pushing the external reset button. For example,

if ( x == 5){
\\reset the controller
}

Is there a way of doing this? I haven't used the watchdog concept. Is it applicable here?

[Tesla DeLorean]

NVIC_SystemReset();