Type coerecion equations

Operator between number and boolean, or between booleans. boolean is converted to number (true == 1, false == 0).

3 + true  //4
3 - true  //2
3 * true  //3
3 / true  //3

3 + false //3
3 - false //3
3 * false //0
3 / false //Infinity

true + false  //1

Add operator between string and number/boolean. number/boolean is converted to string.

'string' + 4  //string4

'string' + true //stringtrue
'string' + false //stringfalse

4 + 'string'  //4string

true + 'string' //truestring
false + 'string' //falsestring


'string' - 4  //NaN
'string' * 4  //NaN
'string' / 4  //NaN

4 - 'string'  //NaN
4 * 'string'  //NaN
4 / 'string'  //NaN

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