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An expression in javascript that can be replaced by its value without affecting the behaviour of the program is called referential transparency. Pure functions are referentially transparent.
javascript
1const add = (x, y) => x + y;
2
3const multiplyBy2 = (x) => x * 2;
4
5//Now add (2, 3) can be replaced by 5.
6
7multiplyBy2(add(2, 3));Advertisement
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