Hello from Mojo in Mojo

The smallest complete Mojo program - an entry point and a print.

def main():
    var language = String("Mojo")
    var year = 2023
    print("Hello from", language)
    print(language, "was announced in", year)

How it works

1. def main(): is the entry point the compiler looks for.
2. var declares a binding, and String("Mojo") builds the value.
3. print takes several arguments and separates them with spaces.

Keywords and builtins used here

• String
• def
• main
• print
• var

The run, in numbers

Lines

5

Characters to type

129

Tokens

34

Three-star pace

100 tpm

At the three-star pace of 100 tokens a minute, this run takes about 20 seconds.

Type this snippet

Step 1 of 6 in Variables & functions, step 1 of 26 in Language basics.

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