In JavaScript conversion between different two build-in types called coercion. Coercion comes in two forms in JavaScript: explicit and implicit.
Example of explicit coercion:
var a = "20"; var b = Number( a ); a; // "20" b;
Example of implicit coercion:
var a = "20"; var b = a * 1; // "20" implicitly coerced to 20 here a; // "20" b; // 20 - the number
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