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Difference between a || b < 0 and a < 0 || b < 0 in JavaScript ?
Last Updated :
09 Jan, 2023
Both expression almost looks the same when we focused on the || (Or) operator, but both expressions are different from each other. To know the final conclusion, we have to get the knowledge of the || (Or) operator first.
JavaScript || (Or) Operator: The ‘OR’ operator is the opposite of the ‘AND’ operator. It does evaluate the operand from left to right. For each operand, it will first convert it to a boolean. If the result is true, it stops and returns the original value of that operand. Otherwise, if all the values are false, it will return the last value.
For in-depth content about other Logical Operators in JavaScript, you can check JavaScript Course Logical Operators in JavaScript
Expression 1:
a < 0 || b < 0
Example: The expression a < 0 || b < 0 gets evaluated and if it’s not a boolean, it’s coerced to one. Both 'a' and 'b' get compared with 0.
JavaScript
<script>
function myFunction(a, b) {
if (a < 0 || b < 0) {
console.log("The value of a and b "+ a, b);
}else{
console.log("GFG")
}
}
myFunction(2,5);
</script>
Output:
GFG
Expression 2:
a || b < 0
Example: The expression gets evaluated and if it’s not a boolean, it’s coerced to one. The value of 'a' gets compared not the 'b'.
JavaScript
<script>
function myFunction(a, b) {
if (a || b < 0) {
console.log("The value of a and b "+ a, b);
}else{
console.log("GFG")
}
}
myFunction(2,5);
</script>
Output:
The value of a and b
2
5
Difference between a || b < 0 and a < 0 || b < 0:
a || b < 0
| a < 0 || b < 0
|
|---|
| In this expression, the value of a will get compared with the 0 | In this expression, the a and b both will get compared with the 0 |
| This is a less used or useless kind of expression. | This is the most used expression to compare two variables. |
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