He couldn't walk in Saul's armor and with Saul's sword (Saul was quite tall, and David was still a young boy at the time). So he needed a) a weapon to use (because he couldn't use the sword) and b) preferably something with range (because he couldn't use the armor). So, since he had a sling, and was a pretty good shot with it from using it to scare predators away from the sheep.
Answer:
According to tradition, David was not a young boy (see 1 Samuel 16:18). He was in his twenties. Also, David did not kill the predators with his sling - he used his hands (1 Samuel 17:35). However, he was physically not a big man.
To address the question, the chief reason that David took nothing but a slingshot was to show his complete trust in God. The death of Goliath was a miracle in which God took part no less than did David.
1 Samuel 17:7 says that Goliath carried a spear that was like a weaver's beam, when he was killed by David. This description was the same as the spear that Goliath was carrying when Elhanan killed him, in 2 Samuel 21:19 (The Hebrew Bible in English, JPS 1917 Edition), although the King James Version renders this as the brother of Goliath, with "the brother of " in italics to show that it was not a true translation.
goliath sword
Nelson is the character of Goliath the second
a scorpion, a sword called backbiter and flying shoes
the most common was the sword,spear,throwing clubs, and bow and arrow as well as shields
He carried a Khopesh sword
No david only killed Goliath ,with a pebble from his sling shot. But david did take four more pebbles maybe for the brothers but they ran away.
stone sword, iron sword, gold sword, and diamond sword
A sword and a sheld
A Sword
Goliath was the giant who fought against a young King David in the Old Testament of the Bible. Goliath's mother was David's mother's sister in law, Orpah.
Look in 1 Samuel 21:8,9 David is fleeing from Saul & he goes to the city of Nob to speak to the priest Ahimelech. He says: Have you not here a spear or a sword at hand, For I have brought neither my sword nor my weapons with me. Ahimelech gives him Goliath's sword that he had been keeping ever since David killed Goliath
sword bow and arrow
His sword, Andúril.
spears and long sword
diamond sword or axe
It has been said that David carried the head of Goliath back to Jerusalem. It is possible the the "skull" the hill is named for is GOLiaths skull.