整数

1. Origins, structure, and basic meaning

• Structure: 整数 is read as せいすう and is the mathematical noun for an integer, a number without a fractional or decimal part.
• Basic usage: Expressing an answer in the required form appears in 答えを整数で表す, while a sequence with negative numbers appears in 負の整数を含む数列.

2. Common pitfalls and similar expressions

• Positive and negative values
  • Integers include positive integers, negative integers, and zero, and have no fractional part.
• Difference from 小数
  • 小数 is a decimal number with digits after the decimal point, while 整数 has no decimal or fractional part.