Interesting

Interesting Facts

num != 0 vs num > 0

• num != 0: checks if the number is not equal to zero evaluate to true for both positive and negative numbers.
• num > 0: checks if the number is greater than zero only positive numbers.

Arithmetic Operators

• Modulo for Even/Odd Checks: (number % 2 == 0) - to find even number and else will be odd.
• Swapping Without a Temporary Variable:

    int a = 5;
    int b = 10;
    a = a + b; // a now becomes 15
    b = a - b; // b becomes 5
    a = a - b; // a becomes 10
  

• index++: if index is zero and if you print this it will be 0 and increment after this statment / line.

• Negation with Logical Operators: if (!(isWeekend || isHoliday)) { - check neither weekend nor holiday.

In Logical Operators

• Short-Circuit Evaluation: boolean condition2 = (condition1 && someMethod()); - someMethod will not called when condition1 is false.
• Combining Conditions: (age > 18 && hasLicense) - you can easily combine conditions.
• Negation with Logical Operators: if (!(isWeekend || isHoliday)) { - check neither weekend nor holiday.