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pablocattaneo/how to check if a key has a value.go

Created January 26, 2026 14:00
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how to check if a key has a value.go
myMap := make(map[string]int)
myMap["key1"] = 15
myMap["key2"] = 100
myMap["key3"] = 7
myMap["key4"] = 23
value, exists := myMap["key1"]
fmt.Println("Value for key1:", value, "Exists:", exists) //Value for key1: 15 Exists: true
valueOfKey10, existsKey10 := myMap["key10"]
fmt.Println("Value for key10:", valueOfKey10, "Exists:", existsKey10) // Value for key10: 0 Exists: false
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