The difference between simulation and reality and warning (332060)

Initial value assignments in (reg [5:0] init= 6’d32; ) will not synthesize. If you need to initialize a register, use reset pin and assign its initial value when that reset activates.

For your example, try the following code:

output [5:0] out;

reg [5:0] init;

assign init = 6’d32;

assign out=init;

The output will be 6'd32 constantly.

For clock constraining, you should consider the worst case frequency of your switch and define a clock with the highest frequency which may occur.

Keep in mind however that this is NOT a good practice. Instead use synchronous sampling of the switch using a sufficiently high speed clock source.