# Combining conditions in JavaScript

Although the operation `&&` takes precedence over `||`, it is often more convenient to use grouping parentheses to explicitly indicate the precedence of operations:

`let num = 3; if ( (num > 0 && num < 5) || (num > 10 && num < 20) ) { console.log('+++'); } else { console.log('---'); }`

Of course, grouping can also be used when you need your own priority of operations, and not the one that is obtained by default:

`let num1 = 3; let num2 = 5; if ( num1 > 0 && (num2 == 3 || num2 == 5) ) { console.log('+++'); } else { console.log('---'); }`

In the code below, specify the precedence of operations explicitly:

`let num = 3; if (num > 5 && num < 10 || num == 20) { console.log('+++'); } else { console.log('---'); }`

In the code below, specify the precedence of operations explicitly:

`let num = 3; if (num > 5 || num > 0 && num < 3) { console.log('+++'); } else { console.log('---'); }`

In the code below, specify the precedence of operations explicitly:

`let num = 3; if (num == 9 || num > 10 && num < 20 || num > 20 && num < 30) { console.log('+++'); } else { console.log('---'); }`
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