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I've gotten every choice EXCEPT 20 -- please explain
let y = 25 - 5 * 2 + 5 XCODE is given me 20 and I have gotten 10 / -10 / and 45 but dont see how this equals 20 in the slightest.
Steven Parker208,478 Points
The result is a combination of operator precedence and order of evaluation:
- multiplication has precedence so it is done first, leaving
25 - 10 + 5
- then the subtraction is done next because of left-to-right evaluation order, leaving
15 + 5
- then performing the addition yields the final result
Gotcha - i went every direction except left to right -- well said!