Long multiplication: Difference between revisions
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=={{header|JavaScript}}==
With integer expression inputs at this scale, JavaScript still gives a slightly lossy result, despite the subsequent digit by digit string concatenation approach.
The problem is that the JavaScript expression Math.pow(2, 64) evaluates to a rounded:
18446744073709552000 rather than the full 18446744073709551616
<lang javascript>function mult(num1,num2){
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