loop_and_conditionals.md

Loops and Conditionals

Loops are used to access elements of a iterable data structure. Conditional statements are used to make decisions. They are also used to skip a check of code dependent on input or other parameters.

Refer conditionals.go in this repository for practical usages.

Conditional statements

If else statements have the following syntax

if (condition1) {
    block 1
} else if (condition2) {
    block 2
} else {
    block 3
}

NOTE: Parentheses are required even if if block has just one statement. Same applies for other conditionals.

There are two types of switch statements:

• Type switch: switch <expression> {}
• Expression switch: switch {} //no expression

Loops

for statements iterate over iterable data structures. One of the ways of using the keyword: for i:= 0; i<10;i++{}. To loop over slices, array, maps or other iterable objects, for is useful. It can be couple with range.

cards = []string{"Ace","Spade"}
for index, suit := range cards{
	fmt.Println(index, suit)
}

:= is used for variables index and suit because these variables are discarded and re-created after each iteration.