鍦⊿hell涓紝鍙互浣跨敤鍚勭宸ュ叿鍜岃娉曟潵杩涜鍥涘垯杩愮畻銆?/p>

1. 浣跨敤expr鍛戒护锛?code>expr鍛戒护鍙互鐢ㄦ潵杩涜绠€鍗曠殑绠楁湳杩愮畻锛屼緥濡傚姞娉曘€佸噺娉曘€佷箻娉曞拰闄ゆ硶銆備笅闈㈡槸涓€浜涚ず渚嬶細

# 鍔犳硶
result=$(expr 2 + 3)
echo $result  # 杈撳嚭: 5
# 鍑忔硶
result=$(expr 5 - 2)
echo $result  # 杈撳嚭: 3
# 涔樻硶
result=$(expr 2 \* 3)
echo $result  # 杈撳嚭: 6
# 闄ゆ硶
result=$(expr 6 / 2)
echo $result  # 杈撳嚭: 3

娉ㄦ剰锛氬湪涔樻硶杩愮畻涓紝涔樺彿闇€瑕佷娇鐢ㄨ浆涔夊瓧绗?code>\*銆?/p>

2. 浣跨敤let鍛戒护锛?code>let鍛戒护鍙互鐢ㄤ簬杩涜绠楁湳杩愮畻锛屽苟涓旀敮鎸佹洿澶嶆潅鐨勮〃杈惧紡銆備笅闈㈡槸涓€浜涚ず渚嬶細

# 鍔犳硶
let result=2+3
echo $result  # 杈撳嚭: 5
# 鍑忔硶
let result=5-2
echo $result  # 杈撳嚭: 3
# 涔樻硶
let result=2*3
echo $result  # 杈撳嚭: 6
# 闄ゆ硶
let result=6/2
echo $result  # 杈撳嚭: 3
# 浣跨敤鎷彿杩涜浼樺厛绾ф帶鍒?/span>
let result=(2+3)*4
echo $result  # 杈撳嚭: 20

3. 浣跨敤$((...))璇硶锛?code>$((...))璇硶鍙互鐢ㄤ簬杩涜绠楁湳杩愮畻锛屽苟涓旀敮鎸佹洿澶嶆潅鐨勮〃杈惧紡銆備笅闈㈡槸涓€浜涚ず渚嬶細

# 鍔犳硶
result=$((2 + 3))
echo $result  # 杈撳嚭: 5
# 鍑忔硶
result=$((5 - 2))
echo $result  # 杈撳嚭: 3
# 涔樻硶
result=$((2 * 3))
echo $result  # 杈撳嚭: 6
# 闄ゆ硶
result=$((6 / 2))
echo $result  # 杈撳嚭: 3
# 浣跨敤鎷彿杩涜浼樺厛绾ф帶鍒?/span>
result=$(((2 + 3) * 4))
echo $result  # 杈撳嚭: 20

鏃犺鏄娇鐢?code>expr鍛戒护銆?code>let鍛戒护杩樻槸$((...))璇硶锛岄兘鍙互鍦⊿hell鑴氭湰涓繘琛屽洓鍒欒繍绠椼€?/p>