How to summon exactly 1000 mobs at once in one command / JAVA / Bedrock: See description / minecraft

How to summon exactly 1000 mobs at once in one command in JAVA!
You can summon 1000 mobs with the command below (please make sure your world has more than 1000 mobs in advance)!
/execute as @e[type=pig,limit=1000] at yourname run summon cow ~ ~ ~10 {ActiveEffects:[{Id:11,Amplifier:5,Duration:10}]}
Please replace
cow with the mob you want to summon;
pig with the mobs executing the commands instead of you;
yourname with your name.

If your world does not have 1000 mobs, you can summon tons of mobs with command block (repeat).

For Bedrock, you can summon 20 zombies at once with:
/execute as @e[c=5] run summon zombie ~ ~ ~

Introduction (0:00)
Preparation (0:30)
Summoning 1000 mobs (3:30)
Summoinng 1000 mobs (Final version!) (4:18)

#Minecraft
#command
#minecraftcommands
#execute
#mob
#1000
#multiple
#commandblock
#commandblocktutorial