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JavaScript

Posted by Pedro Lopes
Pedro Lopes
4,281 Points

Difference between == || ===

for exe:

if (X==A)

if (X===A)

1 Answer

james south
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james south
Front End Web Development Techdegree Graduate 33,271 Points
james south
.a{fill-rule:evenodd;}techdegree seal-36
james south
Front End Web Development Techdegree Graduate 33,271 Points

when you use == JS will attempt to coerce the type of one operand to match the type of the other, then check for value equality. when you use === JS will not coerce types, so if they are not the same, the equality test will fail. so '5' == 5 is true due to type coercion, while '5' === 5 is false, because no coercion has occurred.

Pedro Lopes
Pedro Lopes
4,281 Points

thx for help! the same happen, for example when: float==int; float===int; ?