expected integer constant

Note 002PHP data object (PDO) predefined constant name description PDO: PARAM_BOOL (integer) indicates the Boolean data type. PDO: PARAM_NULL (integer) indicates the NULL data type in SQL. PDO: PARAM_INT (integer) indicates an integer in SQL. PDO:

This article analyzes the usage differences between floating-point (float) and integer (integer) data types in PHP and, in that case, insufficient data lengths. The value can only be true or false, and when other types are converted to Boolean, the

A constant is an identifier whose value remains unchanged during running. The C language uses # define to define constants (called macro constants ). In addition to # define, the C ++ language can also use const to define constants (called const

This article analyzes the differences between float and integer Data Types in php and the insufficient data length in that case. The value can only be True or False. When other types are converted to the boolean type, the following values are

The value can only be True or False. When other types are converted to the boolean type, the following values are considered FALSE:The Boolean value is FALSE.The integer value 0 (0)The floating point value is 0.0 (0)Empty string and string "0"Array

Keil C51 is a compiler compatible with ansi c. The ansi c Specification specifies that the default data types of decimal Integer constants are int, long int, and unsigned long Int, which of the given constants depends on the actual size of the

Objective We know that in mathematics, the size of the number is not the upper limit, but in the computer, due to the limit of word length, the computer can represent a limited range, when we calculate the smaller number, such as: 1234+5678, such a

In Python everything is an object, without exception an integer is also an object, the comparison between objects can be used = =, can also use is. The difference between = = and is operation is:Is compares the ID values of two objects for equality,

Underlying type Although Swift is a new programming language designed to develop iOS and OS X apps, Swift's many features are similar to those of C and objective-c. Swift also provides basic data types similar to C and objective-c, including

Basic Swift data type, swift data typeConstants and variables Constants and variables are represented by a specific name, such as maximumNumberOfLoginAttempt or welcomeMessage. A constant points to a specific type of value, such as a number of 10 or