I read the following on a question on SO:
‘7’ + 4 gives ’74’, whereas ‘7’ – 4 gives 3 in JavaScript
Why does this happen?
I read the following on a question on SO: ‘7’ + 4 gives ’74’,
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I read the following on a question on SO:
‘7’ + 4 gives ’74’, whereas ‘7’ – 4 gives 3 in JavaScript
Why does this happen?
The ‘+’ operator is defined for both strings and numbers, so when you apply it to a string and a number, the number will be converted so string, then the strings will be concatenated:
‘7’ + 4 => ‘7’ + ‘4’ => ’74’
But ‘-‘ is only defined for numbers, not strings, so the string ‘7’ will be converted to number:
‘7’ – 4 => 7 – 4 => 3