Integer literals are 32 bit decimal (base 10) values. A decimal integer literal is a string of decimal digits (0-9).
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An Integer literal is always of type Integer . If an Integer is of insufficient size to hold the value represented by the literal, an error is generated. The upper limit is the standard limit of the host machine, but not less than the range between -2^31-1 to +2^31-1 (-2147483647 to 2147483647).