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The addNumber function returns the sum of two Integers
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| function addNumber(a, b) { | |
| //check to see that 'a' and 'b' are numbers | |
| if (typeof a !== "number" || typeof b !== "number") { | |
| return "first and second parameter's must be numbers"; | |
| } | |
| /* sum both numbers */ | |
| let sum = a + b; | |
| /* if it's an Integer return 'sum', else for floating point numbers approximate to two decimal place*/ | |
| if (Number.isInteger(sum)) { | |
| return sum; | |
| } else { | |
| /* this handles floating point numbers...app*/ | |
| return Number(sum.toFixed(2)); | |
| } | |
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