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# 算术


下表显示了可与 JSON 表达式语言一起使用的算术表达式。


| 操作 | Expression | Input | Output | 
| --- | --- | --- | --- | 
| 加 | ["\$1", operand1, operand2] | \$1 sum: ["\$1", 2, 4] \$1 | \$1 sum: 6 \$1 | 
| 减 | ["-", operand1, operand2] | \$1 difference: ["-", 10, 3] \$1 | \$1 difference: 7 \$1 | 
| 乘 | ["\$1", operand1, operand2] | \$1 product: ["\$1", 5, 6] \$1 | \$1 product: 30 \$1 | 
| 除 | ["/", operand1, operand2] | \$1 quotient: ["/", 20, 4] \$1 | \$1 quotient: 5 \$1 | 
| 取模 | ["%", operand1, operand2] | \$1 remainder: ["%", 15, 4] \$1 | \$1 remainder: 3 \$1 | 
| 幂 | ["\$1\$1", base, exponent] | \$1 power: ["\$1\$1", 2, 3] \$1 | \$1 power: 8 \$1 | 
| 绝对值 | ["abs", operand] | \$1 absolute: ["abs", -5] \$1 | \$1 absolute: 5 \$1 | 
| Square Root | ["sqrt", operand] | \$1 sqroot: ["sqrt", 16] \$1 | \$1 sqroot: 4 \$1 | 
| 对数（以 10 为底） | ["log10", operand] | \$1 log: ["log10", 100] \$1 | \$1 log: 2 \$1 | 
| 自然对数 | ["ln", operand] | \$1 ln: ["ln", Math.E] \$1 | \$1 ln: 1 \$1 | 
| 四舍五入 | ["round", operand] | \$1 rounded: ["round", 3.7] \$1 | \$1 rounded: 4 \$1 | 
| 向下取整 | ["floor", operand] | \$1 floor: ["floor", 3.7] \$1 | \$1 floor: 3 \$1 | 
| 向上取整 | ["ceil", operand] | \$1 ceiling: ["ceil", 3.2] \$1 | \$1 ceiling: 4 \$1 | 
| 正弦 | ["sin", operand] | \$1 sine: ["sin", 0] \$1 | \$1 sine: 0 \$1 | 
| 余弦 | ["cos", operand] | \$1 cosine: ["cos", 0] \$1 | \$1 cosine: 1 \$1 | 
| 正切 | ["tan", operand] | \$1 tangent: ["tan", Math.PI] \$1 | \$1 tangent: 0 \$1 |