Table of Contents
How do you use greater than or equal to in Swift?
Swift supports the following comparison operators:
- Equal to ( a == b )
- Not equal to ( a != b )
- Greater than ( a > b )
- Less than ( a < b )
- Greater than or equal to ( a >= b )
- Less than or equal to ( a <= b )
How to do if else statement in Swift?
- Swift if Statement. The syntax of if statement in Swift is: if (condition) { // body of if statement }
- Swift if…else Statement. An if statement can have an optional else clause.
- Swift if…else if…else Statement. The if…else statement is used to execute a block of code among two alternatives.
What does ~= mean in Swift?
contains
Simply use a shortcut to “range”: you can construct a range and “~=” means “contains”. (
What is if let in Swift?
In if let , the defined let variables are available within the scope of that if condition but not in else condition or even below that. In guard let , the defined let variables are not available in the else condition but after that, it’s available throughout till the function ends or anything.
What does && mean in Swift?
the logical operator
Swift Logical Operators Here, && is the logical operator AND. Since both a > 2 and b >= 6 are true , the result is true . Operator. Example.
How do I compare two objects in Swift?
The == Operator In Swift, the equals operator has almost the same goal it has in other object-oriented programming languages: It compares objects by reference. First of all, keep in mind that the expected boolean depends on what kind of things you’re comparing. In Swift, variables can be value types or reference types.
What is conditional statement in Swift?
Swift Conditional Statements are those which execute a block of code based on the result of a condition or boolean expression. Swift supports following conditional statements.
What is -= in Swift?
-= Subtract AND assignment operator, It subtracts right operand from the left operand and assigns the result to left operand. C -= A is equivalent to C = C – A. *= Multiply AND assignment operator, It multiplies right operand with the left operand and assigns the result to left operand.
What does -= mean in Swift?
+= is an operator that means “add then assign to.” In our case it means “take the current value of b , add 10 to it, then put the result back into b .” As you might imagine, -= does the same but subtracts rather than adds. So, that code will show 10, 20, 10 in the results pane.
What is difference between if and guard in Swift?
In Swift, we use the guard statement to transfer program control out of scope when certain conditions are not met. The guard statement is similar to the if statement with one major difference. The if statement runs when a certain condition is met. However, the guard statement runs when a certain condition is not met.
What does unwrapping mean in Swift?
Unwrapping in Swift is essentially verifying if the Optional value is nil or not, and then it performs a task only if it’s not nil. You can perform unwrapping in the following ways: Using an if else block. Using Forced unwrapping. Using Optional binding.
What is == and === in Swift?
The double-equals operator (==) in Swift is used to check if two values are equal. The === is a meaningless operation between two integers. This is because each integer object in Swift is always unique. In other words, no two variables can point to the same integer object in memory.
Is vs AS in Swift?
Type casting in Swift is implemented with the is and as operators. is is used to check the type of a value whereas as is used to cast a value to a different type.
What does || mean in Swift?
Logical OR Operator
|| Called Logical OR Operator. If any of the two operands is non-zero, then the condition becomes true.
What are higher order functions Swift?
A higher-order function is a function that takes one or more functions as arguments or returns a function as its result. Here are some swift higher-order functions — forEach, map, CompactMap, flatMap, filter, reduce, sort, and sorted.
What is -= in coding?
The subtraction assignment operator ( -= ) subtracts the value of the right operand from a variable and assigns the result to the variable.