Given that all the variables referred to are declared and initialised as below:

Question

Given that all the variables referred to are declared and initialised as below:
double phoneWt=45.6, phoneWidth=11.1;
int screenWidth = 120, screenHeight=100;
String deviceManufacturer = "Motorola";

Evaluate each of the following Java expressions. You must assume that each expression is independent of the others.

(a) deviceManufacturer + screenHeight
(b) screenHeight /= 2
(c) (int)phoneWidth/((int)phoneWidth - 1)
(d) phoneWt - (phoneWidth + 0.9)/2.0
(e) (int)phoneWt - screenWidth / 50
(f) (double)(screenHeight / 30) + 16.0
(g) ((phoneWt > 46.5) || (screenWidth % 10 == 0) && (screenWidth < 200))

Explanation / Answer

(a) invalid operation can't be done for String & int (b) screen height has the value of 50 (c) 0 (d) 22.35 (e) 43 (f) 19.3333333333 (g) true

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