range of values in an if statement

[peachtea]

In my if statement I want the values to be in a range to be within some range for the condition to be true.

for 100 to 199 so i put

if (num >= 100 && num <= 199) --- this is working

200 to 500 and over 900
else if (( num >= 200 || num <= 500) && (num > 900)) -- this is not working
nor is (( num >= 200 && num <= 500) && (num > 900))

" 501 to 900 except 700 to 750"
I have tried

else if (( num >=501 && num<=699) && (num>=751 && num <=900))

but cannot seem to get it to work , I tried to change the || and && though non is working , Please corrected me , any comment on how can I go about this.

Thanks in advance

[Meeshkah]

In your condition (between 200 and 500 OR over 900), you just wrote ( (over 200 OR below 500) AND over 900) so you just wrote that part wrong, it should be :

 if ( (num >= 100 && num <= 500) || num > 900)

That is if I got it right. Try not to loose yourself in the AND and OR statements. A good way to be sure is to formally write it down with parentheses for the priorities then proceed to the replacements.
Try to do it for your other problematic line, that'll do the trick, you'll see.

Good day to you.

[nonoob]

For the second problem:

If (num >= 501 && num < 700 || num > 750 && num <= 900)

[Elysia]

Preferably, use parenthesises to clarify precedence.