Iterate a map with range

suggest change

Iteration order is not specified. Go randomizes the order of iteration on purpose so that code doesn’t incorrectly rely on specific order.

Iterate both keys and values

people := map[string]int{
	"john": 30,
	"jane": 29,
	"mark": 11,
}

for key, value := range people {
	fmt.Printf("key: %s, value: %d\n", key, value)
}

try online

key: john, value: 30
key: jane, value: 29
key: mark, value: 11

Iterate just keys

people := map[string]int{
	"john": 30,
	"jane": 29,
	"mark": 11,
}

for key := range people {
	fmt.Printf("key: %s\n", key)
}

try online

key: john
key: jane
key: mark

Iterate just values

people := map[string]int{
	"john": 30,
	"jane": 29,
	"mark": 11,
}

for _, value := range people {
	fmt.Printf("value: %d\n", value)
}

try online

value: 30
value: 29
value: 11

Found a mistake? Have a question or improvement idea? Let me know.

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